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