[0,1,0,2,1,0,3,2,1,0,3,2,1,2,0,4,3,2,3,1,0,4,3,2, 1,3,4,0,5,4,3,2,4,5,1,0,4,3,2,3,1,2,4,5,0,5,4,3,4, 2,3,5,6,1,0,5,4,3,4,2,1,5,6,3,4,0,6,5,4,5,3,2,6,7, 4,5,1,0,5,4,3,2,4,5,1,2]