You are given a code:

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

Can you predict the output of `main_solution("kxcbqgbpnn")` 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": "kxcbqgbpnn"}, "ref_output": "\u00abjk|\u00bbb\u00ab|xi\u00bb|\u00abyc|\u00bbb\u00ab|bx\u00bb\u00abq\u00bb\u00abg\u00bb\u00abb\u00bb\u00abp\u00bb\u00abn\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('jbiybx', '|'))", "funcname": "main_solution"}
rule