Task: Program Execution
Input (English): 5, 18, ['y', '9359', 'u', 'l', 'W', '1447', 'Q', '5385', '4061', 'D', 'u', '1837', 'S', '3301', 'b', '4065', '8411', 'U', '4551', '3735', 'W', '4559', 'z']
Output (English): W1447Q53854061Du1837S3301b40658411U