You are given a code:

def main_solution(x):
    return func_20(func_20('rneo', x), func_15('uhdu'))

Can you predict the output of `main_solution("acvh")` 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": "acvh"}, "ref_output": "r\u00abaun\u00bbc\u00abehv\u00bbo\u00abhd\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('rneo', x), func_15('uhdu'))", "funcname": "main_solution"}
rule