[1,1,2,1,2,3,1,2,4,3,1,2,4,5,3,1,2,4,5,6,3,1,2,4, 5,7,6,3,1,2,4,5,7,8,6,3,1,2,4,5,7,8,9,6,3,1,2,4,5, 7,8,10,9,6,3,1,2,4,5,7,8,10,11,9,6,3,1,2,4,5,7,8, 10,11,12,9,6,3,1,2,4,5,7,8,10,11,13,12,9,6,3,1,2, 4]