Task: Program Execution
Input (English): 12, 13, ['4769', '865', '3335', 'V', 'r', 'a', '827', 'A', '4927', 'W', '6441', 'x', '3639', 'r', 'O', '2117', '1791', '3529', 'x', 'X', '8429', 'o', 'K', '6977', '429', 'm', '7837']
Output (English): 3639x