[1,2,1,2,3,4,1,3,4,2,3,4,1,3,4,2,5,6,7,8,1,5,6,7, 8,2,5,6,7,8,1,5,6,7,8,2,3,6,5,8,7,4,1,3,6,5,8,7,4, 2,3,6,5,8,7,4,1,3,6,5,8,7,4,2,9,10,11,12,13,14,15, 16,1,9,10,11,12,13,14,15,16,2]