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