You are given a code:

def main_solution(x):
    return func_9('cppz')

Can you predict the output of `main_solution("auvjficft")` 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": "auvjficft"}, "ref_output": "cppzzppc", "ref_code": "def main_solution(x):\n    return func_9('cppz')", "funcname": "main_solution"}
rule