You are given a code:

def main_solution(x):
    return ('vbai' + 'hqhwvq')

Can you predict the output of `main_solution("iacbpgo")` 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": "iacbpgo"}, "ref_output": "vbaihqhwvq", "ref_code": "def main_solution(x):\n    return ('vbai' + 'hqhwvq')", "funcname": "main_solution"}
rule