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