class Multiply {
  public void DoingMultiply() {
    System.out.println("Multiply Multiply");
  }
}

class IntegerMultiply extends Multiply {
  public void DoingMultiply() {
    System.out.println("Doing Integer Multiply");
  }
}

public class MatrixMultiply extends Multiply {
  public void DoingMultiply() {
    System.out.println("Doing Matrix Multiply");
  }
  public static void main(String[] args) {
    Multiply myMultiply = new Multiply();  // Create a Multiply object
    Multiply myIntegerMultiply = new IntegerMultiply();  // Create a IntegerMultiply object
    Multiply myMatrixMultiply = new MatrixMultiply();  // Create a MatrixMultiply object
    myMultiply.DoingMultiply();
    myIntegerMultiply.DoingMultiply();
    myMatrixMultiply.DoingMultiply();
  }
}