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