You are given a code:

def main_solution(x):
    return func_20('hzcb', 'qayr')

Can you predict the output of `main_solution("kozzndz")` 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": "kozzndz"}, "ref_output": "hqzacybr", "ref_code": "def main_solution(x):\n    return func_20('hzcb', 'qayr')", "funcname": "main_solution"}
rule