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