You are given a code:

def main_solution(x):
    return func_20(func_15('ote'), func_13(x, '-'))

Can you predict the output of `main_solution("tengk")` 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": "tengk"}, "ref_output": "\u00abto-\u00bbe\u00ab-tn\u00bb-\u00abge-\u00bbk", "ref_code": "def main_solution(x):\n    return func_20(func_15('ote'), func_13(x, '-'))", "funcname": "main_solution"}
rule