import java.util.Stack;

/**
 * Created by 李天龙
 */
public class Serise {
    public static void main(String args[]) {
        Stack<Integer> stack = new Stack<Integer>();
        stack.push(new Integer(3));
        int a=stack.peek();
        System.out.println(a);
        stack.push(new Integer(8));
        int b=stack.peek();
        System.out.println(b);
        int n=1;
            while (n < 10) {
                for (int i = 1; i < 3; i++) {
                    Integer A1 = stack.pop();
                    int a1 = A1.intValue();
                    Integer A2 = stack.pop();
                    int a2 = A2.intValue();
                    Integer temp = new Integer(2 * a1 + 2 * a2);
                    System.out.println("" + temp.toString());
                    stack.push(temp);
                    stack.push(a2);
                    n++;
                }
            }
    }
}