You are given a code:

def main_solution(x):
    return func_20(func_1('zmnhgb', 3), func_15(x))

Can you predict the output of `main_solution("ddbxqmby")` 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": "ddbxqmby"}, "ref_output": "z\u00abmdn\u00bbh\u00abgdb\u00bbz\u00abmbn\u00bbh\u00abgxb\u00bbz\u00abmqn\u00bbh\u00abgmb\u00bb\u00abb\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('zmnhgb', 3), func_15(x))", "funcname": "main_solution"}
rule