[1,1,2,1,2,3,4,1,2,3,4,5,6,1,2,3,4,5,6,7,8,9,10,1, 2,3,4,5,6,7,8,9,10,11,12,1,2,3,4,5,6,7,8,9,10,11, 12,13,14,15,16,1,2,3,4,5,6,7,8,9,10,11,12,13,14, 15,16,17,18,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 16,17,18,19,20]