You are given a code:

def main_solution(x):
    return ('mgbvsy' + 'atqi')

Can you predict the output of `main_solution("isimcopyo")` 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": "isimcopyo"}, "ref_output": "mgbvsyatqi", "ref_code": "def main_solution(x):\n    return ('mgbvsy' + 'atqi')", "funcname": "main_solution"}
rule