[9,8,7,6,5,4,3,2,1,90,9,8,7,6,5,4,3,2,1,80,9,8,7, 6,5,4,3,2,1,70,9,8,7,6,5,4,3,2,1,60,9,8,7,6,5,4,3, 2,1,50,9,8,7,6,5,4,3,2,1,40,9,8,7,6,5,4,3,2,1,30, 9,8,7,6,5,4,3,2,1,20,9,8,7,6]