You are given a code:

def main_solution(x):
    return func_20(func_23('gelq', 2), func_15('frcuu'))

Can you predict the output of `main_solution("bfrwydj")` 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": "bfrwydj"}, "ref_output": "g\u00abefl\u00bbq\u00ab1r\u00bb\u00abc\u00bb\u00abu\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_23('gelq', 2), func_15('frcuu'))", "funcname": "main_solution"}
rule