You are given a code:

def main_solution(x):
    return (('ebte' + 'mvchnl') + ('usc' + 'cvoe'))

Can you predict the output of `main_solution("dko")` 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": "dko"}, "ref_output": "ebtemvchnlusccvoe", "ref_code": "def main_solution(x):\n    return (('ebte' + 'mvchnl') + ('usc' + 'cvoe'))", "funcname": "main_solution"}
rule