You are given a code:

def main_solution(x):
    return func_5('jev', 'frxx')

Can you predict the output of `main_solution("jfctve")` 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": "jfctve"}, "ref_output": "frxxjev", "ref_code": "def main_solution(x):\n    return func_5('jev', 'frxx')", "funcname": "main_solution"}
rule