2 4 6 8 10 12 14 16 17 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
1,2,3,4,5 6,7,8,9,10 11,12,13,15,16,17
33, 34, 35, 36, 37, 38, 39, 40, 41, 42 43, 44, 45, 46, 47, 48, 49, 50
