You are given a code:

def main_solution(x):
    return func_20(func_15('zof'), func_20('ilnln', 'sycgz'))

Can you predict the output of `main_solution("gcoweihgwj")` 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": "gcoweihgwj"}, "ref_output": "\u00abizs\u00bbl\u00abyon\u00bbc\u00ablfg\u00bbnz", "ref_code": "def main_solution(x):\n    return func_20(func_15('zof'), func_20('ilnln', 'sycgz'))", "funcname": "main_solution"}
rule