[0,1,0,2,1,0,3,2,1,0,4,3,2,1,0,5,4,3,2,1,0,6,5,4, 3,2,1,0,7,6,5,4,3,2,1,0,8,7,6,5,4,3,2,1,0,9,8,7,6, 5,4,3,2,1,0,10,9,8,7,6,5,4,3,2,1,0,11,10,9,8,7,6, 5,4,3,2,1,0,12,11,10,9,8,7,6,5,4,3,2,1,0,13,12,11, 10,9,8,7,6,5,4,3]