Task: Program Execution
Input (English): D, 1317, x, f, E, h, D, C, Z, R, J, 6937, q, J, 9431, 723, 9487, o, E
Output (English): 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 18, 19