import java.util.*;
public class FindDups {
public static void main(String args[]){
Set s = new HashSet();
for (int i=0; i<args.length; i++)
if (!s.add(args[i]))
System.out.println("Duplicate detected: " +
args[i]);
System.out.println(s.size() +
" distinct words detected: " +
s);
}
}