You are given a code:

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

Can you predict the output of `main_solution("uuexpmcd")` 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": "uuexpmcd"}, "ref_output": "beuxxueb", "ref_code": "def main_solution(x):\n    return func_9('beux')", "funcname": "main_solution"}
rule