You are given a code:

def main_solution(x):
    return func_20(func_20(x, x), func_15('pfkqdo'))

Can you predict the output of `main_solution("zawhzmlv")` 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": "zawhzmlv"}, "ref_output": "z\u00abzpa\u00bba\u00abwfw\u00bbh\u00abhkz\u00bbz\u00abmqm\u00bbl\u00abldv\u00bbv\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, x), func_15('pfkqdo'))", "funcname": "main_solution"}
rule