You are given a code:

def main_solution(x):
    return func_20(func_1('buihb', 2), func_15('nfnkfq'))

Can you predict the output of `main_solution("yfuxfrmw")` 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": "yfuxfrmw"}, "ref_output": "b\u00abuni\u00bbh\u00abbfb\u00bbu\u00abinh\u00bbb\u00abk\u00bb\u00abf\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('buihb', 2), func_15('nfnkfq'))", "funcname": "main_solution"}
rule