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