Task: Program Execution
Input (English): 21, 22, ['X', '5639', '8469', '1589', '4673', '8615', '4317', 't', 'M', 'U', '1031', '5135', 'h', 'x', 'k', '8839', 'e', 'S', '8941', 'W', 'X', 'f', '2711', 'J', '5607', 'f', 'M', 'C']
Output (English): f, X