You are given a code:

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

Can you predict the output of `main_solution("nyyb")` 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": "nyyb"}, "ref_output": "n\u00abyiy\u00bbb\u00abbpy\u00bby\u00abnc\u00bb\u00aby\u00bb\u00abn\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('ipcynk'))", "funcname": "main_solution"}
rule