public class Problem3 {

    public static void main(String[] argv) throws java.io.IOException {
        byte[] y = new byte[16];
        byte[] z = new byte[24];

        System.in.read(z);
        AES aes = new AES(z);

        while (System.in.read(y) != -1)
            System.out.write(aes.decrypt(y));
    }
}