You are given a code:

def main_solution(x):
    return func_20(func_15('uoje'), func_23('banci', 1))

Can you predict the output of `main_solution("bmaofvbta")` 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": "bmaofvbta"}, "ref_output": "\u00abbua\u00bbn\u00abcoi\u00bb1\u00abj\u00bb\u00abe\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('uoje'), func_23('banci', 1))", "funcname": "main_solution"}
rule