import java.lang.*;

public class MessageN

{

    public static void main (String args[])

      {
         //working with Strings

	 String message1 = "Start ";
	 String message2 = " End";
	 String message3 = message1+message2;

	 System.out.println(message3 + " This is message3");
	 System.out.println();

	 String A="Start";
	 A = A+" End";
	 System.out.println (A + " This is A ");

	 //use of StringBuffer class

	 System.out.println();
	 StringBuffer B=new StringBuffer(50);
	 B.append("Chris");
	 B.insert(5,"sy");   // inserts charecter into a string
	 B.append(" IOAKIM");
	 B.setCharAt(8,' ');  // manipulates an individual charecter
	 B.setCharAt(9,'Y');  // manipulates an individual charecter

	 System.out.println(B.toString() + " This is the String Buffer");
   
       }

}// end main