import java.util.*;

public class StringBufferManipulator {
    public static void main (String args[]) {

		// Preliminaries
		System.out.println ("StringBuffer manipulator\n");
		Scanner stdin = new Scanner (System.in);
	
		// Step 1
		System.out.println ("Enter a long string");
		String longString = stdin.nextLine();
		System.out.println ("\nEnter a shorter string within the long string");
		String shortString = stdin.nextLine();
		System.out.println ();
	
		// Step 2
		StringBuffer buffer = new StringBuffer(longString);
	
		// Step 3
		// StringBuffer buffer = new StringBuffer();
		// buffer.append(longString();
	
		// Step 4
		int pos = buffer.indexOf(shortString);
	
		// Step 5
		int shortLength = shortString.length();
		buffer.delete (pos, pos+shortLength);
		System.out.println (buffer);
	
		// Step 6
		buffer.insert (pos, "CS101");
		System.out.println (buffer);
	
		// Step 7
		pos = buffer.lastIndexOf(" ");
		int bufferLength = buffer.length();
		buffer.delete(pos, bufferLength);
		System.out.println (buffer);
	
		// Step 8
		buffer.append (" rocks");
		System.out.println (buffer);
	
		// Step 9
		int n = buffer.length();
		buffer.deleteCharAt (n/2);
		System.out.println (buffer);
	
		// Step 10
		buffer.reverse();
		System.out.println (buffer);

    }
}