You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'xeiy'), func_15('atbmfy'))

Can you predict the output of `main_solution("xpeuizxs")` 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": "xpeuizxs"}, "ref_output": "x\u00abxap\u00bbe\u00abeti\u00bbu\u00abybi\u00bbz\u00abxms\u00bb\u00abf\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'xeiy'), func_15('atbmfy'))", "funcname": "main_solution"}
rule