You are given a code:

def main_solution(x):
    return func_20(func_15('vzkxr'), func_1('alok', 4))

Can you predict the output of `main_solution("khykfn")` 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": "khykfn"}, "ref_output": "\u00abavl\u00bbo\u00abkza\u00bbl\u00abokk\u00bba\u00ablxo\u00bbk\u00abarl\u00bbok", "ref_code": "def main_solution(x):\n    return func_20(func_15('vzkxr'), func_1('alok', 4))", "funcname": "main_solution"}
rule