You are given a code:

def main_solution(x):
    return func_20(func_15('qzke'), func_9('rswaum'))

Can you predict the output of `main_solution("phapbb")` 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": "phapbb"}, "ref_output": "\u00abrqs\u00bbw\u00abazu\u00bbm\u00abmku\u00bba\u00abwes\u00bbr", "ref_code": "def main_solution(x):\n    return func_20(func_15('qzke'), func_9('rswaum'))", "funcname": "main_solution"}
rule