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