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