You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_13('uuyaa', '-'))

Can you predict the output of `main_solution("owylhn")` 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": "owylhn"}, "ref_output": "\u00abuo-\u00bbu\u00ab-wy\u00bb-\u00abay-\u00bba\u00abl\u00bb\u00abh\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('uuyaa', '-'))", "funcname": "main_solution"}
rule