You are given a code:

def main_solution(x):
    return func_22(('vfrxa' + 'qbm'))

Can you predict the output of `main_solution("kciz")` 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": "kciz"}, "ref_output": "vfrxaqbm", "ref_code": "def main_solution(x):\n    return func_22(('vfrxa' + 'qbm'))", "funcname": "main_solution"}
rule