[1,2,3,4,1,5,2,6,3,7,4,1,8,5,2,9,6,3,10,7,4,1,11, 8,5,2,12,9,6,3,13,10,7,4,1,14,11,8,5,2,15,12,9,6, 3,16,13,10,7,4,1,17,14,11,8,5,2,18,15,12,9,6,3,19, 16,13,10,7,4,1,20,17,14,11,8,5,2,21,18,15,12,9,6, 3]