You are given a code:

def main_solution(x):
    return func_13(('icojy' + 'edq'), '-')

Can you predict the output of `main_solution("aetdv")` 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": "aetdv"}, "ref_output": "i-c-o-j-y-e-d-q", "ref_code": "def main_solution(x):\n    return func_13(('icojy' + 'edq'), '-')", "funcname": "main_solution"}
rule