[1,1,2,2,2,3,3,3,4,4,4,5,5,5,5,5,5,7,7,7,7,7,7,8, 8,8,9,9,9,9,9,9,9,9,9,12,12,12,12,12,12,12,12,12, 12,12,12,13,13,13,13,13,13,16,16,16,16,16,16,16, 16,16,16,16,16,16,16,16,16,16,16,20,20,20,20,20, 20,20,20,20,21]