You are given a code:

def main_solution(x):
    return func_20(func_15('kkqfzi'), func_1(x, 3))

Can you predict the output of `main_solution("trhylyfzb")` 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": "trhylyfzb"}, "ref_output": "\u00abtkr\u00bbh\u00abykl\u00bby\u00abfqz\u00bbb\u00abtfr\u00bbh\u00abyzl\u00bby\u00abfiz\u00bbbtrhylyfzb", "ref_code": "def main_solution(x):\n    return func_20(func_15('kkqfzi'), func_1(x, 3))", "funcname": "main_solution"}
rule