You are given a code:

def main_solution(x):
    return func_9(func_5('bfh', 'dg'))

Can you predict the output of `main_solution("btbeqd")` 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": "btbeqd"}, "ref_output": "dgbfhhfbgd", "ref_code": "def main_solution(x):\n    return func_9(func_5('bfh', 'dg'))", "funcname": "main_solution"}
rule