You are given a code:

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

Can you predict the output of `main_solution("vcnty")` 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": "vcnty"}, "ref_output": "\u00abtt-\u00bbo\u00ab-yz\u00bb-\u00abpg-\u00bbt\u00abq\u00bb\u00abh\u00bb\u00abt\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('tygqht'), func_13('tozpt', '-'))", "funcname": "main_solution"}
rule