You are given a code:

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

Can you predict the output of `main_solution("djrirtfbf")` 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": "djrirtfbf"}, "ref_output": "\u00abdtj\u00bbr\u00abiur\u00bbt\u00abfsb\u00bbf\u00ab1f\u00bb\u00abh\u00bb\u00abc\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('tusfhc'), func_23(x, 1))", "funcname": "main_solution"}
rule