Task: Program Execution
Input (English): 6969 D c 5347 89 e 8963 U M 2537 1615 g 3353 S 5515 1451 I 1963 6581 d 5945 O H k 9423 99 3947 6937 N 2141 9019 919
Output (English): 1, 4, 5, 7, 10, 11, 13, 15, 16, 18, 19, 21, 25, 26, 27, 28, 30, 31, 32