You are given a code:

def main_solution(x):
    return func_20(func_5('uxeh', 'wz'), func_15('kdudph'))

Can you predict the output of `main_solution("vnu")` 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": "vnu"}, "ref_output": "w\u00abzku\u00bbx\u00abedh\u00bb\u00abu\u00bb\u00abd\u00bb\u00abp\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('uxeh', 'wz'), func_15('kdudph'))", "funcname": "main_solution"}
rule