You are given a code:

def main_solution(x):
    return func_20(func_9('hxumj'), func_15('ids'))

Can you predict the output of `main_solution("zbau")` 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": "zbau"}, "ref_output": "h\u00abxiu\u00bbm\u00abjdj\u00bbm\u00abusx\u00bbh", "ref_code": "def main_solution(x):\n    return func_20(func_9('hxumj'), func_15('ids'))", "funcname": "main_solution"}
rule