Task: Program Execution
Input (English): d 6685 D 3523 2155 5763 1703 e 1273 7041 9137 s W q 6625 S G y v 4551 7203 x 5693 7657 Z 1081 223 I 3771
Output (English): 1, 3, 8, 12, 13, 14, 16, 17, 18, 19, 22, 25, 28