You are given a code:

def main_solution(x):
    return func_20(func_23(x, 3), func_15('svbx'))

Can you predict the output of `main_solution("sxcuxuhnu")` 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": "sxcuxuhnu"}, "ref_output": "s\u00abxsc\u00bbu\u00abxvu\u00bbh\u00abnbu\u00bb1\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_23(x, 3), func_15('svbx'))", "funcname": "main_solution"}
rule