[0,2,1,3,2,3,2,4,3,4,3,4,3,5,3,5,4,5,4,5,4,5,4,6, 4,6,4,6,5,5,4,6,5,6,5,6,5,6,5,6,5,6,5,7,5,6,5,6,6, 7,5,7,6,7,5,7,6,7,6,6,5,7,5,7,6,7,6,7,6,7,6,7,6,8, 6,7,6,7,6,8,6,7,6,8,6,8,6]