[1,2,2,3,0,3,4,0,0,4,5,0,0,0,5,6,0,0,0,0,6,7,0,0, 0,0,0,7,8,0,0,0,0,0,0,8,9,0,0,0,0,0,0,0,9,10,0,0, 0,0,0,0,0,0,10,11,0,0,0,0,0,0,0,0,0,11,12,0,0,0,0, 0,0,0,0,0,0,12,13,0,0,0,0,0,0,0,0,0,0,0,13,14,0,0, 0,0,0,0,0,0,0]