You are given a code:

def main_solution(x):
    return func_20(func_15('ergo'), ('dozuua' + x))

Can you predict the output of `main_solution("qoyv")` 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": "qoyv"}, "ref_output": "\u00abdeo\u00bbz\u00aburu\u00bba\u00abqgo\u00bby\u00abvo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ergo'), ('dozuua' + x))", "funcname": "main_solution"}
rule