You are given a code:

def main_solution(x):
    return func_20(func_5('fyhbld', 'ags'), func_15('zwpd'))

Can you predict the output of `main_solution("dpdgbun")` 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": "dpdgbun"}, "ref_output": "a\u00abgzs\u00bbf\u00abywh\u00bbb\u00ablpd\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('fyhbld', 'ags'), func_15('zwpd'))", "funcname": "main_solution"}
rule