You are given a code:

def main_solution(x):
    return func_13(func_20(x, 'hbotd'), '-')

Can you predict the output of `main_solution("dhdzqxiokf")` 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": "dhdzqxiokf"}, "ref_output": "d-h-h-b-d-o-z-t-q-d-x-i-o-k-f", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'hbotd'), '-')", "funcname": "main_solution"}
rule