[0,1,0,2,1,0,3,2,1,4,0,3,2,5,1,4,0,3,6,2,5,1,4,7, 0,3,6,2,5,8,1,4,7,0,3,6,9,2,5,8,1,4,7,10,0,3,6,9, 2,5,8,11,1,4,7,10,0,3,6,9,12,2,5,8,11,1,4,7,10,13, 0,3,6,9,12,2,5,8,11,14,1,4,7,10,13,0,3,6,9,12,15, 2,5,8,11,14,1,4,7]