You are given a code:

def main_solution(x):
    return (func_15('bibtq') + ('irkkbg' + 'hoeajo'))

Can you predict the output of `main_solution("imxpepsatj")` 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": "imxpepsatj"}, "ref_output": "\u00abb\u00bb\u00abi\u00bb\u00abb\u00bb\u00abt\u00bb\u00abq\u00bbirkkbghoeajo", "ref_code": "def main_solution(x):\n    return (func_15('bibtq') + ('irkkbg' + 'hoeajo'))", "funcname": "main_solution"}
rule