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