What is the output of this program?

    #include <iostream>
    using namespace std;
    void Sum(int a, int b, int & c)
    {
        a = b + c;
        b = a + c;
        c = a + b;
    }
    int main()
    {
        int x = 2, y =3;
        Sum(x, y, y);
        cout << x << " " << y;
        return 0; 
    }