You are given a code:

def main_solution(x):
    return func_20(func_15('kiniah'), func_20(x, x))

Can you predict the output of `main_solution("jlfbyfokl")` 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": "jlfbyfokl"}, "ref_output": "\u00abjkj\u00bbl\u00ablif\u00bbf\u00abbnb\u00bby\u00abyif\u00bbf\u00aboao\u00bbk\u00abkhl\u00bbl", "ref_code": "def main_solution(x):\n    return func_20(func_15('kiniah'), func_20(x, x))", "funcname": "main_solution"}
rule