View Code of Problem 97

import  java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        while(sc.hasNext()) {
            int n = sc.nextInt();
            if(n == 0) {
                break;
            }
            List<String> list = new ArrayList<>();
            for(int i = 0; i < n; i ++) {
                list.add(sc.next());
            }
            Collections.sort(list);
            for(int i = 0; i < n; i ++) {
                String s = list.get(i);
                if(s.length() > 4 && s.substring(s.length() - 4, s.length()).equals(".exe")) {
                    String s1 = s.substring(0, s.length() - 4);
                    if(list.indexOf(s1) != -1) {
                        System.out.println(s);
                    }
                }
            }
        }
    }
}