You are given a code:

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

Can you predict the output of `main_solution("ilisjgm")` 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": "ilisjgm"}, "ref_output": "\u00abgxy\u00bbg\u00abvhc\u00bbu\u00abutc\u00bbv\u00abgry\u00bbg\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('xhtrn'), func_9('gygvcu'))", "funcname": "main_solution"}
rule