You are given a code:

def main_solution(x):
    return func_20(func_15('ztpxa'), func_23('binwh', 1))

Can you predict the output of `main_solution("hxnusx")` 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": "hxnusx"}, "ref_output": "\u00abbzi\u00bbn\u00abwth\u00bb1\u00abp\u00bb\u00abx\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ztpxa'), func_23('binwh', 1))", "funcname": "main_solution"}
rule