You are given a code:

def main_solution(x):
    return func_20(func_15('awwfu'), func_1('zyuh', 4))

Can you predict the output of `main_solution("nujof")` 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": "nujof"}, "ref_output": "\u00abzay\u00bbu\u00abhwz\u00bby\u00abuwh\u00bbz\u00abyfu\u00bbh\u00abzuy\u00bbuh", "ref_code": "def main_solution(x):\n    return func_20(func_15('awwfu'), func_1('zyuh', 4))", "funcname": "main_solution"}
rule