[0,1,2,3,4,5,4,7,8,6,5,9,8,9,7,6,11,12,9,10,8,7, 11,12,13,10,11,9,8,15,12,13,14,11,12,10,9,16,17, 13,14,15,12,13,11,10,16,17,18,14,15,16,13,14,12, 11,16,17,18,19,15,16,17,14,15,13,12,22,17,18,19]