Task: Program Execution
Input (English): c 7693 3761 m 1557 C d R 4807 367 j 2653 k J L K 9787 B c L 2025 U s 7977 u
Output (English): 1, 4, 6, 7, 8, 11, 13, 14, 15, 16, 18, 19, 20, 22, 23, 25