You are given a code:

def main_solution(x):
    return (func_15(x) + func_9('ofkern'))

Can you predict the output of `main_solution("haobkogpr")` 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": "haobkogpr"}, "ref_output": "\u00abh\u00bb\u00aba\u00bb\u00abo\u00bb\u00abb\u00bb\u00abk\u00bb\u00abo\u00bb\u00abg\u00bb\u00abp\u00bb\u00abr\u00bbofkernnrekfo", "ref_code": "def main_solution(x):\n    return (func_15(x) + func_9('ofkern'))", "funcname": "main_solution"}
rule