1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 0
- 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 X 13 X 14 X 15 X 16 X 17 X 18
- 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12
- 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10
- 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9
- (x-1)(x+2)(x+3)(x+6)