You are given a code:

def main_solution(x):
    return func_20(func_20('cmo', 'rprjgb'), func_4('xznh'))

Can you predict the output of `main_solution("zaxwnw")` 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": "zaxwnw"}, "ref_output": "cxrzmnphorjgb", "ref_code": "def main_solution(x):\n    return func_20(func_20('cmo', 'rprjgb'), func_4('xznh'))", "funcname": "main_solution"}
rule