You are given a code:

def main_solution(x):
    return func_5('uiow', 'dkl')

Can you predict the output of `main_solution("vdr")` 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": "vdr"}, "ref_output": "dkluiow", "ref_code": "def main_solution(x):\n    return func_5('uiow', 'dkl')", "funcname": "main_solution"}
rule