Nodes of the tree are printed as m-e, that is:
take m times Boolean algebras of cardinality 2^e.
-----------------------------------------
Shapes of L-IBSLs of cardinality  20 :
This tree:
20-0
generates 1 L-IBSL.

This tree:
1-1
└── 18-0
generates 1 L-IBSL.

This tree:
2-1
└── 16-0
generates 1 L-IBSL.

This tree:
3-1
└── 14-0
generates 1 L-IBSL.

This tree:
4-1
└── 12-0
generates 1 L-IBSL.

This tree:
5-1
└── 10-0
generates 1 L-IBSL.

This tree:
6-1
└── 8-0
generates 1 L-IBSL.

This tree:
7-1
└── 6-0
generates 1 L-IBSL.

This tree:
8-1
└── 4-0
generates 1 L-IBSL.

This tree:
9-1
└── 2-0
generates 1 L-IBSL.

This tree:
10-1
generates 1 L-IBSL.

This tree:
1-2
├── 16-0
├── 1-1
│   └── 14-0
├── 2-1
│   └── 12-0
├── 3-1
│   └── 10-0
├── 4-1
│   └── 8-0
├── 5-1
│   └── 6-0
├── 6-1
│   └── 4-0
├── 7-1
│   └── 2-0
└── 8-1
generates the following exponents' sequences:
[[2], [1, 2], [1, 1, 2], [1, 1, 1, 2], [1, 1, 1, 1, 2], [1, 1, 1, 1, 1, 2], [1, 1, 1, 1, 1, 1, 2], [1, 1, 1, 1, 1, 1, 1, 2], [1, 1, 1, 1, 1, 1, 1, 1, 2]]
This permutation: [2]
generates  1 L-IBSLs.

This permutation: [1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This tree:
2-2
├── 12-0
├── 1-1
│   └── 10-0
├── 2-1
│   └── 8-0
├── 3-1
│   └── 6-0
├── 4-1
│   └── 4-0
├── 5-1
│   └── 2-0
└── 6-1
generates the following exponents' sequences:
[[2, 2], [1, 2, 2], [1, 1, 2, 2], [1, 1, 1, 2, 2], [1, 1, 1, 1, 2, 2], [1, 1, 1, 1, 1, 2, 2], [1, 1, 1, 1, 1, 1, 2, 2]]
This permutation: [2, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 1, 1, 1]
generates  2 L-IBSLs.

This tree:
3-2
├── 8-0
├── 1-1
│   └── 6-0
├── 2-1
│   └── 4-0
├── 3-1
│   └── 2-0
└── 4-1
generates the following exponents' sequences:
[[2, 2, 2], [1, 2, 2, 2], [1, 1, 2, 2, 2], [1, 1, 1, 2, 2, 2], [1, 1, 1, 1, 2, 2, 2]]
This permutation: [2, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [1, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [2, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 2, 1, 1]
generates  4 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 2, 1, 1]
generates  4 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 2, 1, 1, 1]
generates  4 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 2, 2, 1, 1]
generates  4 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 2, 1, 1, 1]
generates  4 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 2, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 2, 1, 1, 1, 1]
generates  4 L-IBSLs.

This tree:
4-2
├── 4-0
├── 1-1
│   └── 2-0
└── 2-1
generates the following exponents' sequences:
[[2, 2, 2, 2], [1, 2, 2, 2, 2], [1, 1, 2, 2, 2, 2]]
This permutation: [2, 2, 2, 2]
generates  8 L-IBSLs.

This permutation: [1, 2, 2, 2, 2]
generates  8 L-IBSLs.

This permutation: [2, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 2, 1, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 1, 2]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 2, 1]
generates  8 L-IBSLs.

This permutation: [1, 1, 2, 2, 2, 2]
generates  8 L-IBSLs.

This permutation: [1, 2, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 2, 1, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 2, 2, 1, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 2, 2, 2, 1]
generates  8 L-IBSLs.

This permutation: [2, 1, 1, 2, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 1, 2, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [2, 2, 1, 1, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 2, 1, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 1, 1, 2]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 1, 2, 1]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 2, 1, 1]
generates  8 L-IBSLs.

This tree:
5-2
generates the following exponents' sequences:
[[2, 2, 2, 2, 2]]
This permutation: [2, 2, 2, 2, 2]
generates  16 L-IBSLs.

This tree:
1-3
├── 12-0
├── 1-1
│   └── 10-0
├── 2-1
│   └── 8-0
├── 3-1
│   └── 6-0
├── 4-1
│   └── 4-0
├── 5-1
│   └── 2-0
├── 6-1
├── 1-2
│   ├── 8-0
│   ├── 1-1
│   │   └── 6-0
│   ├── 2-1
│   │   └── 4-0
│   ├── 3-1
│   │   └── 2-0
│   └── 4-1
├── 2-2
│   ├── 4-0
│   ├── 1-1
│   │   └── 2-0
│   └── 2-1
└── 3-2
generates the following exponents' sequences:
[[3], [1, 3], [1, 1, 3], [1, 1, 1, 3], [1, 1, 1, 1, 3], [1, 1, 1, 1, 1, 3], [1, 1, 1, 1, 1, 1, 3], [2, 3], [1, 2, 3], [1, 1, 2, 3], [1, 1, 1, 2, 3], [1, 1, 1, 1, 2, 3], [2, 2, 3], [1, 2, 2, 3], [1, 1, 2, 2, 3], [2, 2, 2, 3]]
This permutation: [3]
generates  1 L-IBSLs.

This permutation: [1, 3]
generates  1 L-IBSLs.

This permutation: [3, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 3, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 3, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 1, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 3]
generates  2 L-IBSLs.

This permutation: [3, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 3]
generates  2 L-IBSLs.

This permutation: [1, 3, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 3]
generates  1 L-IBSLs.

This permutation: [2, 3, 1]
generates  2 L-IBSLs.

This permutation: [3, 1, 2]
generates  1 L-IBSLs.

This permutation: [3, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [1, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 2, 3, 1]
generates  2 L-IBSLs.

This permutation: [1, 3, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 3, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [2, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [2, 3, 1, 1]
generates  2 L-IBSLs.

This permutation: [3, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [3, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [3, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 3, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 3, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 3, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 3, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 3, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [3, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 2, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 2, 3, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 1, 3, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 1, 3, 2, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 2, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 2, 3, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 1, 3, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 3, 2, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 2, 3, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [1, 3, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [1, 3, 2, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 1, 3, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 1, 3, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 3, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [3, 1, 1, 1, 1, 2]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 1, 2, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 1, 2, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 1, 2, 1, 1, 1]
generates  1 L-IBSLs.

This permutation: [3, 2, 1, 1, 1, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 3]
generates  4 L-IBSLs.

This permutation: [2, 3, 2]
generates  4 L-IBSLs.

This permutation: [3, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 2, 3]
generates  4 L-IBSLs.

This permutation: [1, 2, 3, 2]
generates  4 L-IBSLs.

This permutation: [1, 3, 2, 2]
generates  4 L-IBSLs.

This permutation: [2, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [2, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 3]
generates  2 L-IBSLs.

This permutation: [2, 2, 3, 1]
generates  4 L-IBSLs.

This permutation: [2, 3, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 3, 2, 1]
generates  4 L-IBSLs.

This permutation: [3, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [3, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [3, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [1, 1, 2, 2, 3]
generates  4 L-IBSLs.

This permutation: [1, 1, 2, 3, 2]
generates  4 L-IBSLs.

This permutation: [1, 1, 3, 2, 2]
generates  4 L-IBSLs.

This permutation: [1, 2, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [1, 2, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 1, 3]
generates  2 L-IBSLs.

This permutation: [1, 2, 2, 3, 1]
generates  4 L-IBSLs.

This permutation: [1, 2, 3, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 2, 3, 2, 1]
generates  4 L-IBSLs.

This permutation: [1, 3, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [1, 3, 2, 1, 2]
generates  2 L-IBSLs.

This permutation: [1, 3, 2, 2, 1]
generates  4 L-IBSLs.

This permutation: [2, 1, 1, 2, 3]
generates  2 L-IBSLs.

This permutation: [2, 1, 1, 3, 2]
generates  2 L-IBSLs.

This permutation: [2, 1, 2, 1, 3]
generates  1 L-IBSLs.

This permutation: [2, 1, 2, 3, 1]
generates  2 L-IBSLs.

This permutation: [2, 1, 3, 1, 2]
generates  1 L-IBSLs.

This permutation: [2, 1, 3, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 1, 3]
generates  2 L-IBSLs.

This permutation: [2, 2, 1, 3, 1]
generates  2 L-IBSLs.

This permutation: [2, 2, 3, 1, 1]
generates  4 L-IBSLs.

This permutation: [2, 3, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [2, 3, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [2, 3, 2, 1, 1]
generates  4 L-IBSLs.

This permutation: [3, 1, 1, 2, 2]
generates  2 L-IBSLs.

This permutation: [3, 1, 2, 1, 2]
generates  1 L-IBSLs.

This permutation: [3, 1, 2, 2, 1]
generates  2 L-IBSLs.

This permutation: [3, 2, 1, 1, 2]
generates  2 L-IBSLs.

This permutation: [3, 2, 1, 2, 1]
generates  2 L-IBSLs.

This permutation: [3, 2, 2, 1, 1]
generates  4 L-IBSLs.

This permutation: [2, 2, 2, 3]
generates  8 L-IBSLs.

This permutation: [2, 2, 3, 2]
generates  8 L-IBSLs.

This permutation: [2, 3, 2, 2]
generates  8 L-IBSLs.

This permutation: [3, 2, 2, 2]
generates  8 L-IBSLs.

This tree:
2-3
├── 4-0
├── 1-1
│   └── 2-0
├── 2-1
└── 1-2
generates the following exponents' sequences:
[[3, 3], [1, 3, 3], [1, 1, 3, 3], [2, 3, 3]]
This permutation: [3, 3]
generates  3 L-IBSLs.

This permutation: [1, 3, 3]
generates  3 L-IBSLs.

This permutation: [3, 1, 3]
generates  1 L-IBSLs.

This permutation: [3, 3, 1]
generates  3 L-IBSLs.

This permutation: [1, 1, 3, 3]
generates  3 L-IBSLs.

This permutation: [1, 3, 1, 3]
generates  1 L-IBSLs.

This permutation: [1, 3, 3, 1]
generates  3 L-IBSLs.

This permutation: [3, 1, 1, 3]
generates  1 L-IBSLs.

This permutation: [3, 1, 3, 1]
generates  1 L-IBSLs.

This permutation: [3, 3, 1, 1]
generates  3 L-IBSLs.

This permutation: [2, 3, 3]
generates  6 L-IBSLs.

This permutation: [3, 2, 3]
generates  4 L-IBSLs.

This permutation: [3, 3, 2]
generates  6 L-IBSLs.

This tree:
1-4
├── 4-0
├── 1-1
│   └── 2-0
├── 2-1
└── 1-2
generates the following exponents' sequences:
[[4], [1, 4], [1, 1, 4], [2, 4]]
This permutation: [4]
generates  1 L-IBSLs.

This permutation: [1, 4]
generates  1 L-IBSLs.

This permutation: [4, 1]
generates  1 L-IBSLs.

This permutation: [1, 1, 4]
generates  1 L-IBSLs.

This permutation: [1, 4, 1]
generates  1 L-IBSLs.

This permutation: [4, 1, 1]
generates  1 L-IBSLs.

This permutation: [2, 4]
generates  2 L-IBSLs.

This permutation: [4, 2]
generates  2 L-IBSLs.

There are  772  L-IBSLs of cardinality  20
-----------------------------------------

