You are given a code:

def main_solution(x):
    return func_13(func_5('rywd', 'ymx'), '-')

Can you predict the output of `main_solution("klmk")` 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": "klmk"}, "ref_output": "y-m-x-r-y-w-d", "ref_code": "def main_solution(x):\n    return func_13(func_5('rywd', 'ymx'), '-')", "funcname": "main_solution"}
rule