[[a1, a2, a3, ...], [b1, b2, b3, ...], [c1, c2, c3, ...], ...]
[[2, 2, 2], [3, 3, 3, 3, 3], [4, 4, 4]] -> True; [[2, 2, 1], [3, 3, 3, 3, 3], [1, 1, 1]] -> False; [[1,1,1],[3,3,3,3],[1,1,1,1,1]] -> False
a
b
c
ṛ/, [[1,2,3],[1,2,2],[1,1,1],[1,2,2,3,2],[3,3,3]] -> [[[1,2,3],[3,3,3]],[[1,2,2],[1,2,2,3,2]],[[1,1,1]]]