Task: Program Execution
Input (English): 13, 17, ['9967', '9983', '101', 'O', '5169', '5615', 'n', '691', '1377', 'K', '1881', 'X', 'L', '4117', 'f', 'J', 'M', 'H', 'n', 't']
Output (English): MJf4117L