You are given a code:

def main_solution(x):
    return func_20(func_5('vjq', 'zjh'), func_13(x, '-'))

Can you predict the output of `main_solution("gndwwdrde")` 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": "gndwwdrde"}, "ref_output": "zgj-hnv-jdq-w-w-d-r-d-e", "ref_code": "def main_solution(x):\n    return func_20(func_5('vjq', 'zjh'), func_13(x, '-'))", "funcname": "main_solution"}
rule