# 5 different group configurations
[[ 0,  1,  2,  3], [ 4,  5,  6,  7], [ 8,  9, 10, 11], [12, 13, 14, 15]]
[[ 3,  7,  9, 15], [ 6, 14, 11,  1], [ 2,  8, 12,  4], [13,  5,  0, 10]]
[[ 5,  8,  1, 15], [ 0, 12,  6,  9], [ 7, 11, 13,  2], [14, 10,  3,  4]]
[[13,  8,  3,  6], [ 9,  5,  2, 14], [10, 12,  1,  7], [ 4, 11,  0, 15]]
[[15,  2, 10,  6], [ 3,  5, 11, 12], [ 0,  8, 14,  7], [ 4, 13,  9,  1]]
