[0,1,2,3,4,5,6,7,8,2,4,6,8,10,12,14,16,2,3,4,5,6, 7,8,9,10,4,5,6,7,8,9,10,11,12,6,7,8,9,10,11,12,13, 14,8,9,10,11,12,13,14,15,16,10,11,12,13,14,15,16, 17,18,12,13,14,15,16,17,18,19,20,14]