package pure nothrow @nogc immutable
auto matrix =
[[[2, 0, 6, 4], [3, 1, 7, 5], [10, 8, 14, 12], [11, 9, 15, 13]], [[4, 14, 13, 9], [8, 10, 6, 15], [0, 1, 5, 11], [2, 12, 3, 7]], [[12, 11, 15, 5], [0, 8, 13, 2], [3, 10, 9, 7], [6, 14, 4, 1]], [[3, 7, 11, 13], [1, 9, 14, 12], [5, 2, 15, 4], [10, 6, 8, 0]], [[5, 9, 10, 2], [7, 0, 15, 4], [11, 14, 3, 6], [12, 1, 13, 8]], [[6, 2, 8, 0], [10, 12, 3, 11], [7, 4, 1, 15], [5, 13, 9, 14]], [[1, 12, 4, 14], [15, 5, 10, 13], [6, 0, 8, 9], [3, 7, 11, 2]], [[7, 13, 3, 12], [14, 11, 9, 1], [15, 5, 2, 8], [4, 0, 10, 6]], [[14, 6, 0, 11], [9, 15, 8, 3], [13, 12, 10, 1], [7, 2, 5, 4]], [[8, 10, 1, 7], [4, 2, 5, 6], [9, 15, 13, 3], [14, 11, 0, 12]], [[2, 0, 6, 4], [3, 1, 7, 5], [10, 8, 14, 12], [11, 9, 15, 13]], [[4, 14, 13, 9], [8, 10, 6, 15], [0, 1, 5, 11], [2, 12, 3, 7]]];
Undocumented in source.