You are given a code:

def main_solution(x):
    return (func_9('txbd')).capitalize()

Can you predict the output of `main_solution("hwdnn")` 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": "hwdnn"}, "ref_output": "Txbddbxt", "ref_code": "def main_solution(x):\n    return (func_9('txbd')).capitalize()", "funcname": "main_solution"}
rule