You are given a code:

def main_solution(x):
    return func_5('cuvoxx', 'jgs')

Can you predict the output of `main_solution("vpd")` 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": "vpd"}, "ref_output": "jgscuvoxx", "ref_code": "def main_solution(x):\n    return func_5('cuvoxx', 'jgs')", "funcname": "main_solution"}
rule