class A
{
    int x;
    static int y;
    void f()
    {
        this.x = 100;
        A.y = 200;
    }
}
class A2
{
    int x;
    static int y;
    void f()
    {
        x = 100;
        y = 200;
    }
}
class B
{
    void f()
    {
        this.g();
        B.h();
    }    
    void g()
    {
        System.out.println("ok");
    }
    static void h()
    {
        System.out.println("hello");
    }
}
class B2
{
    void f()
    {
        g();
        h();
    }    
    void g()
    {
        System.out.println("ok");
    }
    static void h()
    {
        System.out.println("hello");
    }
}