7,3,6,4,8,4,6,5,8,5,5,6,9,6,5,7,9,7,4,8,10,8,4,9,10,9,3,10,11,10,3,11,11,11,2,12,12,12,2,13,12,13,1,14,13,14,1,15,2,15,3,15,4,15,5,15,6,15,7,15,8,15,9,15,10,15,11,15,12,15,13,15