You are given a code:

def main_solution(x):
    return func_20(('wvcgvc').swapcase(), func_15('hpuzys'))

Can you predict the output of `main_solution("votnba")` 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": "votnba"}, "ref_output": "W\u00abVhC\u00bbG\u00abVpC\u00bb\u00abu\u00bb\u00abz\u00bb\u00aby\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('wvcgvc').swapcase(), func_15('hpuzys'))", "funcname": "main_solution"}
rule