You are given a code:

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

Can you predict the output of `main_solution("drburyfuqk")` 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": "drburyfuqk"}, "ref_output": "d\u00abrqb\u00bbu\u00abrty\u00bbf\u00abutq\u00bbk\u00ab1s\u00bb\u00abu\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_23(x, 2), func_15('qttsuh'))", "funcname": "main_solution"}
rule