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