You are given a code:

def main_solution(x):
    return func_20('bgzh', 'iufxr')

Can you predict the output of `main_solution("cdzkudxw")` 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": "cdzkudxw"}, "ref_output": "biguzfhxr", "ref_code": "def main_solution(x):\n    return func_20('bgzh', 'iufxr')", "funcname": "main_solution"}
rule