You are given a code:

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

Can you predict the output of `main_solution("xomjjlk")` 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": "xomjjlk"}, "ref_output": "\u00abjvu\u00bbp\u00abtnw\u00bbw\u00abtkp\u00bbu\u00abje\u00bb\u00abk\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('vnkekq'), func_9('juptw'))", "funcname": "main_solution"}
rule