Task: Program Execution
Input (English): 9897, 9671, 8125, 4673, w, 8143, d, 3245, 8461, 6581, 9529, u, 3055, 8285, 965, i, 9433, M, O, 195, f, 7273, 8487
Output (English): 1, 2, 3, 4, 6, 8, 9, 10, 11, 13, 14, 15, 17, 20, 22, 23