Solution.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Scanner;

public class Solution {
	    private static final Scanner scan = new Scanner(System.in);
	    
	    static  String readFile(String fileName) throws IOException {

	        BufferedReader br = new BufferedReader(new FileReader(fileName));

	        try {

	            StringBuilder sb = new StringBuilder();

	            String line = br.readLine();
	            while (line != null) {
	                String[] temp = line.split(" ");
	                String tempRes = temp[6];
	                String lastWord = tempRes.substring(tempRes.lastIndexOf("/") + 1);
	                
	                if(lastWord.contains(".gif")){
	                    sb.append(lastWord);
	                    sb.append("\n");
	                }
	                

	               

	                line = br.readLine();

	            }
	            System.out.println(sb.toString());
	            return sb.toString();

	        } finally {

	            br.close();

	        }

	    }
	    
	    public static void main(String args[]) throws Exception {
	        // read the string filename
	        String filename;
	        //filename = "testss.txt";
	        filename = scan.next();   
	        OutputStream os = null;
	        String data = readFile(filename);
	        String resultFileName = "gifs_"+filename;

	        try {

	            // below true flag tells OutputStream to append

	            os = new FileOutputStream(new File(resultFileName), true);

	            os.write(data.getBytes(), 0, data.length());

	        } catch (IOException e) {

	            e.printStackTrace();

	        } finally {

	            try {

	                os.close();

	            } catch (IOException e) {

	                e.printStackTrace();

	            }

	        }
	        
	    }
	}