You are given a code:

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

Can you predict the output of `main_solution("nqmjuoqz")` 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": "nqmjuoqz"}, "ref_output": "\u00abnpn\u00bbq\u00abqtm\u00bbm\u00abjqj\u00bbu\u00abuto\u00bbo\u00abqhq\u00bbzz", "ref_code": "def main_solution(x):\n    return func_20(func_15('ptqth'), func_20(x, x))", "funcname": "main_solution"}
rule