You are given a code:

def main_solution(x):
    return (func_5('erco', 'xfu')).capitalize()

Can you predict the output of `main_solution("onadrks")` 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": "onadrks"}, "ref_output": "Xfuerco", "ref_code": "def main_solution(x):\n    return (func_5('erco', 'xfu')).capitalize()", "funcname": "main_solution"}
rule