You are given a code:

def main_solution(x):
    return (func_5('ifzqfr', 'jwp') + ('qfjx' + 'nayzxn'))

Can you predict the output of `main_solution("afvf")` 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": "afvf"}, "ref_output": "jwpifzqfrqfjxnayzxn", "ref_code": "def main_solution(x):\n    return (func_5('ifzqfr', 'jwp') + ('qfjx' + 'nayzxn'))", "funcname": "main_solution"}
rule