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