You are given a code:

def main_solution(x):
    return func_20(func_22('fbw'), func_17('pyslfr'))

Can you predict the output of `main_solution("ypuqhzsv")` 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": "ypuqhzsv"}, "ref_output": "frbflsyp", "ref_code": "def main_solution(x):\n    return func_20(func_22('fbw'), func_17('pyslfr'))", "funcname": "main_solution"}
rule