You are given a code:

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

Can you predict the output of `main_solution("frnntcy")` 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": "frnntcy"}, "ref_output": "\u00abfkr\u00bbn\u00abnft\u00bbc\u00abycy\u00bbc\u00abtdn\u00bbn\u00abrbf\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('kfcdbn'), func_9(x))", "funcname": "main_solution"}
rule