Task: Program Execution
Input (English): 2367, 1685, x, 8469, 9779, A, s, 3065, 8437, j, 4681, 3265, 9643, u, 6971, 6645, O, 4207
Output (English): 1, 2, 4, 5, 8, 9, 11, 12, 13, 15, 16, 18