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