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