What will be the output of the following C# code snippet?

class sum   
{
    public int x;
    public int y;
    public  int add (int a, int b)
   {
       x = a + b;
       y = x + b;
       return 0;
   }
}    
class Program
{
    static void Main(string[] args)
    {
        sum obj1 = new sum();
        sum obj2 = new sum();   
        int a = 2;
        obj1.add(a, a + 1);
        obj2.add(5, a);
        Console.WriteLine(obj1.x + "  " + obj2.y);     
        Console.ReadLine();
    }
}