You are given a code:

def main_solution(x):
    return ('mstbis' + 'uihc')

Can you predict the output of `main_solution("cgqeos")` 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": "cgqeos"}, "ref_output": "mstbisuihc", "ref_code": "def main_solution(x):\n    return ('mstbis' + 'uihc')", "funcname": "main_solution"}
rule