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