You are given a code:

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

Can you predict the output of `main_solution("wxvnbtvq")` 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": "wxvnbtvq"}, "ref_output": "x\u00ab-pz\u00bb-\u00abli-\u00bbe\u00ab-ti\u00bb\u00abj\u00bb\u00abb\u00bb\u00abf\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_13('xzlei', '-'), func_15('pitjbf'))", "funcname": "main_solution"}
rule