You are given a code:

def main_solution(x):
    return (func_13(x, '-') + func_5('vskju', 'jdg'))

Can you predict the output of `main_solution("uafpou")` 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": "uafpou"}, "ref_output": "u-a-f-p-o-ujdgvskju", "ref_code": "def main_solution(x):\n    return (func_13(x, '-') + func_5('vskju', 'jdg'))", "funcname": "main_solution"}
rule