Task: Program Execution
Input (English): M, d, O, 9389, D, 5027, w, F, 759, 1937, 2245, 6951, w, 2815, l, 6031, U, r, x, L, 5001, 2719, 6849
Output (English): 1, 2, 3, 5, 7, 8, 13, 15, 17, 18, 19, 20