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