You are given a code:

def main_solution(x):
    return func_20(func_13(x, '|'), func_15('gdzw'))

Can you predict the output of `main_solution("abgcskgnhl")` 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": "abgcskgnhl"}, "ref_output": "a\u00ab|gb\u00bb|\u00abgd|\u00bbc\u00ab|zs\u00bb|\u00abkw|\u00bbg|n|h|l", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '|'), func_15('gdzw'))", "funcname": "main_solution"}
rule