You are given a code:

def main_solution(x):
    return func_20(func_9('twlyqf'), func_15('gzui'))

Can you predict the output of `main_solution("rgggp")` 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": "rgggp"}, "ref_output": "t\u00abwgl\u00bby\u00abqzf\u00bbf\u00abquy\u00bbl\u00abwit\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9('twlyqf'), func_15('gzui'))", "funcname": "main_solution"}
rule