Task: Program Execution
Input (English): 4, ['1213', '4307', '9741', 'M', 't', 'V', '3217', '6937', '6627', '8327', '4381', '9127', '8615', '1629', 'l', '4481', 'i', '5143']
Output (English): 1213, 4307, 9741, M