Case: 1 (good) 0123456789 0123456789 Case: 2 (good) 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Case: 3 (good) 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Case: 4 (yikes) 1 3 5 7 9 11 13 15 17 19 1 3 5 7 9 11 13 15 17 19