You are given a code:

def main_solution(x):
    return func_20(func_15('brezx'), (x + 'okjgry'))

Can you predict the output of `main_solution("vismdu")` 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": "vismdu"}, "ref_output": "\u00abvbi\u00bbs\u00abmrd\u00bbu\u00aboek\u00bbj\u00abgzr\u00bby\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('brezx'), (x + 'okjgry'))", "funcname": "main_solution"}
rule