[0,1,2,3,4,5,6,7,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7, 8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,7,6,5,4,3,2,1,0, 1,2,3,4,5,6,7,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,7, 6,5,4,3,2,1,0,1,2,3,4,5]