You are given a code:

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

Can you predict the output of `main_solution("qdldqgebvt")` 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": "qdldqgebvt"}, "ref_output": "q-v-d-s-l-o-d-z-q-l-g-e-b-v-t", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'vsozl'), '-')", "funcname": "main_solution"}
rule