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