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