Task: Program Execution
Input (English): 3, 4, ['A', '2271', '3591', 'u', '9327', 'R', 'A', '1299', '3711', '5175', 'D', 'R', '4197', 'a', 'Z', '293', '6235', '4723', '4449', '2789', 'm', 'Q', 'd', '6197', 'U']
Output (English): 3591u