You are given a code:

def main_solution(x):
    return ('boadr' + 'fgf')

Can you predict the output of `main_solution("lvosfnfs")` 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": "lvosfnfs"}, "ref_output": "boadrfgf", "ref_code": "def main_solution(x):\n    return ('boadr' + 'fgf')", "funcname": "main_solution"}
rule