caterpillar
min-max 3
1 2 3 | 3 - 0 = 3
4 5 6 | 7 - 4 = 3
7 8 9 | 11 - 8 = 3
min-sum 8
1 3 4 5 6 7 8 | 9 - 1 = 8
2 | 0 - 0 = 0
9 | 11 - 11 = 0
