You are given a code:

def main_solution(x):
    return func_20(func_15('vpwqbz'), ('swxio' + x))

Can you predict the output of `main_solution("fbobxhmauo")` 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": "fbobxhmauo"}, "ref_output": "\u00absvw\u00bbx\u00abipo\u00bbf\u00abbwo\u00bbb\u00abxqh\u00bbm\u00ababu\u00bbo\u00abz\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('vpwqbz'), ('swxio' + x))", "funcname": "main_solution"}
rule