interface A {
	void f1();
	}
interface B{
	void f2();
	}
class C implements A,B{
	public void f1(){
		System.out.println("f1()");
		}
	public void f2(){
		System.out.println("f2()");
		}
	void cFunc1(A a){
	    a.f1();
	    }
	void cFunc2(B b){
		b.f2();
		}
	public static void main(String arg[]){
		C c=new C();
		c.cFunc1(c);
		c.cFunc2(c);
		}
	
	}