GroupMin
[[1, 1], [1, 1], [8, 1], [8, 1], [9, 1], [9, 1], [8, 1], [8, 1], [8, 1], [8, 1], [8, 1], [9, 1], [1, 1], [2, 1], [2, 1], [2, 1], [2, 1], [2, 1], [2, 1], [2, 1]]
