You are given a code:

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

Can you predict the output of `main_solution("kjoe")` 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": "kjoe"}, "ref_output": "u\u00abkkd\u00bby\u00abujk\u00bbd\u00abyou\u00bbk\u00abdey\u00bbukdy", "ref_code": "def main_solution(x):\n    return func_20(func_1('ukdy', 4), func_15(x))", "funcname": "main_solution"}
rule