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