[1,1,1,2,1,3,1,4,2,2,1,5,1,6,2,3,1,7,1,8,2,4,1,9, 3,3,1,10,2,5,1,11,1,12,2,6,3,4,1,13,1,14,2,7,1,15, 3,5,1,16,2,8,4,4,1,17,1,18,2,9,3,6,1,19,1,20,2,10, 4,5,1,21,3,7]