You are given a code:

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

Can you predict the output of `main_solution("oevep")` 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": "oevep"}, "ref_output": "\u00abho|\u00bba\u00ab|ea\u00bb|\u00abiv|\u00bbu\u00ab|ej\u00bb\u00abp\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('haaiuj', '|'))", "funcname": "main_solution"}
rule