You are given a code:

def main_solution(x):
    return func_20(func_22('myjw'), func_4('oox'))

Can you predict the output of `main_solution("zlbw")` 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": "zlbw"}, "ref_output": "moyojxw", "ref_code": "def main_solution(x):\n    return func_20(func_22('myjw'), func_4('oox'))", "funcname": "main_solution"}
rule