You are given a code:

def main_solution(x):
    return func_20('oriym', 'qtdzrn')

Can you predict the output of `main_solution("dvkbky")` 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": "dvkbky"}, "ref_output": "oqrtidyzmrn", "ref_code": "def main_solution(x):\n    return func_20('oriym', 'qtdzrn')", "funcname": "main_solution"}
rule