You are given a code:

def main_solution(x):
    return func_5('vlnboi', 'ddkn')

Can you predict the output of `main_solution("nnt")` 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": "nnt"}, "ref_output": "ddknvlnboi", "ref_code": "def main_solution(x):\n    return func_5('vlnboi', 'ddkn')", "funcname": "main_solution"}
rule