You are given a code:

def main_solution(x):
    return (func_20('xoee', x) + func_13(x, '|'))

Can you predict the output of `main_solution("ntpksyl")` 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": "ntpksyl"}, "ref_output": "xnotepeksyln|t|p|k|s|y|l", "ref_code": "def main_solution(x):\n    return (func_20('xoee', x) + func_13(x, '|'))", "funcname": "main_solution"}
rule