Generate how many keys?
32 38 40 44 47 + 6 9
 4  7 11 36 43 + 4 6
 4 17 18 27 45 + 7 8
29 35 38 40 48 + 1 8
12 33 43 45 46 + 1 9
 3 15 22 45 47 + 5 6
17 21 22 36 38 + 1 6
 1 21 30 32 46 + 2 3
 4 10 13 15 38 + 2 5
24 30 36 38 46 + 2 7