You are given a code:

def main_solution(x):
    return func_9(func_20('uofdu', 'mjj'))

Can you predict the output of `main_solution("yynontpp")` 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": "yynontpp"}, "ref_output": "umojfjduudjfjomu", "ref_code": "def main_solution(x):\n    return func_9(func_20('uofdu', 'mjj'))", "funcname": "main_solution"}
rule