Task: Program Execution
Input (English): 18, 21, ['M', 'L', 't', '6265', 'S', '5291', '4649', '3075', '7967', 'P', 'T', 'm', 'j', '9431', '8383', '3467', '23', 'C', '8489', 'a', 'o', '9549', 'C', '939', '8845']
Output (English): oa8489C