[3,2,1,4,3,2,3,4,5,6,3,4,5,4,5,6,7,4,5,6,7,6,5,6, 5,6,7,6,5,8,7,6,7,8,7,6,7,6,7,8,7,6,7,8,7,8,9,8,7, 8,9,8,7,8,7,8,9,8,7,8,9,8,9,8,9,10,9,8,9,10,9,8,9, 8,9,10,9,8,9,10,9,10,9,10,9,10]