class Shape 
  { void draw() { System.out.println("Shape"); }}
class Triangle extends Shape 
  { void draw() { System.out.println("Triangle"); }}
class Square extends Shape 
  { void draw() { System.out.println("Square"); }}

class test {
   public static void main(String [] a) {
   Shape s;
   if (a[0].equals("t")) { s= new Triangle(); } 
   else if (a[0].equals("s")) { s= new Square(); }
   else { s= new Shape(); }

   s.draw();}}