Task: Program Execution
Input (English): 4, 19, ['2881', '5701', '9823', '2255', '7491', 'B', '4457', 'T', 'P', '6945', 'N', 'a', '3135', 'i', '3653', '2477', '9119', 'b', 'x', 'Y']
Output (English): 22557491B4457TP6945Na3135i365324779119bx