layout = array2d(1..17,1..3, [
19, 16, 35, 22, 11, 44, 37, 38, 32, 29, 42, 50, 17, 49, 48, 6, 46, 45, 14, 34, 25, 41, 2, 13, 40, 3, 15, 30, 47, 26, 24, 23, 7, 20, 51, 39, 33, 27, 43, 9, 8, 52, 10, 21, 4, 12, 31, 5, 36, 28, 18, 
]);