[0,1,2,1,2,3,4,4,2,3,4,4,5,6,7,7,8,8,9,10,11,12, 13,13,9,10,10,11,12,12,13,13,14,15,16,16,17,18,19, 19,20,21,22,23,23,24,25,25,19,19,20,21,22,22,23, 23,24,25,26,26,27,28,28,28,29,30,31,32,33,33,34, 34,35,36,36,37,38]