You are given a code:

def main_solution(x):
    return func_20(func_15('afafum'), func_5(x, 'mzw'))

Can you predict the output of `main_solution("zunxjqq")` 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": "zunxjqq"}, "ref_output": "\u00abmaz\u00bbw\u00abzfu\u00bbn\u00abxaj\u00bbq\u00abqf\u00bb\u00abu\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('afafum'), func_5(x, 'mzw'))", "funcname": "main_solution"}
rule