You are given a code:

def main_solution(x):
    return func_20(func_1(x, 3), func_15('wuopeh'))

Can you predict the output of `main_solution("vius")` 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": "vius"}, "ref_output": "v\u00abiwu\u00bbs\u00abvui\u00bbu\u00absov\u00bbi\u00abups\u00bb\u00abe\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1(x, 3), func_15('wuopeh'))", "funcname": "main_solution"}
rule