You are given a code:

def main_solution(x):
    return func_20(func_9(x), func_15('tenm'))

Can you predict the output of `main_solution("qyilstraug")` 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": "qyilstraug"}, "ref_output": "q\u00abyti\u00bbl\u00abset\u00bbr\u00abanu\u00bbg\u00abgmu\u00bbartsliyq", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('tenm'))", "funcname": "main_solution"}
rule