You are given a code:

def main_solution(x):
    return func_5('azvf', 'wqi')

Can you predict the output of `main_solution("cumjzofow")` 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": "cumjzofow"}, "ref_output": "wqiazvf", "ref_code": "def main_solution(x):\n    return func_5('azvf', 'wqi')", "funcname": "main_solution"}
rule