You are given a code:

def main_solution(x):
    return func_20(func_15('mawu'), func_9('swzkec'))

Can you predict the output of `main_solution("peirbmwvw")` 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": "peirbmwvw"}, "ref_output": "\u00absmw\u00bbz\u00abkae\u00bbc\u00abcwe\u00bbk\u00abzuw\u00bbs", "ref_code": "def main_solution(x):\n    return func_20(func_15('mawu'), func_9('swzkec'))", "funcname": "main_solution"}
rule