You are given a code:

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

Can you predict the output of `main_solution("ocuwstqx")` 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": "ocuwstqx"}, "ref_output": "o-a-c-x-u-h-w-k-s-t-t-k-q-x", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'axhktk'), '-')", "funcname": "main_solution"}
rule