You are given a code:

def main_solution(x):
    return func_20('unok', 'iucdm')

Can you predict the output of `main_solution("gmlmiw")` 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": "gmlmiw"}, "ref_output": "uinuockdm", "ref_code": "def main_solution(x):\n    return func_20('unok', 'iucdm')", "funcname": "main_solution"}
rule