x x x x x 1 0 0
x x x x x 2 1 1
x x x x x 3 2 2
x x x x x 4 3 3
x x x x x 5 4 4
x x x x x 6 5 5
x x x x x 7 6 6
x x x x x 8 7 7
x x x x x 9 8 8
x x x x x 10 9 9
x x x x x 11 10 10