You are given a code:

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

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