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