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