You are given a code:

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

Can you predict the output of `main_solution("fzdnhfueoo")` 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": "fzdnhfueoo"}, "ref_output": "f\u00abfbz\u00bbz\u00abdjd\u00bbn\u00abndh\u00bbh\u00abfrf\u00bbu\u00abule\u00bbe\u00aboqo\u00bboo", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, x), func_15('bjdrlq'))", "funcname": "main_solution"}
rule