You are given a code:

def main_solution(x):
    return func_13(func_9('wox'), '-')

Can you predict the output of `main_solution("lngkgei")` 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": "lngkgei"}, "ref_output": "w-o-x-x-o-w", "ref_code": "def main_solution(x):\n    return func_13(func_9('wox'), '-')", "funcname": "main_solution"}
rule