Task: Program Execution
Input (English): 9723, 7563, i, C, o, f, D, n, 4199, 1979, W, l, C, 6819, 3125, B, 2859, w, 379, 6617, Z, M
Output (English): 1, 2, 9, 10, 14, 15, 17, 19, 20