Task: Program Execution
Input (English): M, 7471, 2917, 9049, 4223, o, 6639, 7953, 4529, 3297, 8809, I, 1289, O, m, f, 9291, 6475
Output (English): 13, 7471, 2917, 9049, 4223, 15, 6639, 7953, 4529, 3297, 8809, 9, 1289, 15, 13, 6, 9291, 6475