You are given a code:

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

Can you predict the output of `main_solution("koaieo")` 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": "koaieo"}, "ref_output": "\u00abak|\u00bbs\u00ab|oy\u00bb|\u00abua|\u00bbe\u00abi\u00bb\u00abe\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('asyue', '|'))", "funcname": "main_solution"}
rule