You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20('zncnv', 'wbf'))

Can you predict the output of `main_solution("panutk")` 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": "panutk"}, "ref_output": "\u00abzpw\u00bbn\u00abbac\u00bbf\u00abnnv\u00bb\u00abu\u00bb\u00abt\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20('zncnv', 'wbf'))", "funcname": "main_solution"}
rule