class Te01 {
  public static void main(String[] args) {
    System.out.println( new Ex1().m(5) );
  }
}

interface I1 {
  int m(int a);
}

interface IC1 {
  int p(int b);
}

class Ex1 implements I1 {
  int x;
  public int m(int a) {
     x=(new C1().p(a+1))+4;   
     return x;
  }
}

class C1 implements IC1 {
  public int p(int b) {
    return b+1;
  }
}