class KA {
    static int fa = 4;
    int foo = fa + 7;
    }

class KB extends KA {
    private int fa = 5;
    }

class KC extends KB {
    int erg () { return ((KA)this).fa; }
    }



class Test {

    public static void main(String args[]) {

        System.out.println(KA.fa);
        //System.out.println(KA.foo);
        KA myKA = new KA();
        System.out.println(myKA.foo);

        KC myKC = new KC();

        System.out.println(myKC.erg());

    }
}