You are given a code:

def main_solution(x):
    return func_9('qpuw')

Can you predict the output of `main_solution("mrli")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "mrli"}, "ref_output": "qpuwwupq", "ref_code": "def main_solution(x):\n    return func_9('qpuw')", "funcname": "main_solution"}
rule