//import practicaloo.*;

public class TextInputStreamTest
{  public static void main(String[] args) 
   {  System.out.println("Enter a number, I'll add two to it.");
      TextInputStream in = new TextInputStream(System.in);
      double x; // the number we wish to read
      x = in.readDouble();
      System.out.println(x + 2); 
   }
}