You are given a code:

def main_solution(x):
    return ('uqeh' + 'irlh')

Can you predict the output of `main_solution("vvml")` 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": "vvml"}, "ref_output": "uqehirlh", "ref_code": "def main_solution(x):\n    return ('uqeh' + 'irlh')", "funcname": "main_solution"}
rule