You are given a code:

def main_solution(x):
    return func_20(func_4('rkg'), func_17('bvebs'))

Can you predict the output of `main_solution("qzjwzy")` 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": "qzjwzy"}, "ref_output": "rskbgevb", "ref_code": "def main_solution(x):\n    return func_20(func_4('rkg'), func_17('bvebs'))", "funcname": "main_solution"}
rule