Task: Program Execution
Input (English): 5, 15, ['m', '7541', 'U', 'r', '5215', '3183', '8757', '1199', '4541', 'X', '8007', '9255', '2507', 'K', 'F', '3575', 'z', 't', '4517', 'Q', '8861']
Output (English): 52153183875711994541X800792552507KF