package TestSet;
import java.util.*;
public class SetTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Set words=new HashSet<>();
long totalTime=0;
Scanner in=new Scanner(System.in);
while(in.hasNext()){
String word=in.next();
long callTime=System.currentTimeMillis();
words.add(word);
callTime=System.currentTimeMillis()-callTime;
totalTime=+callTime;
}
Iterator iter=words.iterator();
for(int i=1;i<=20&&iter.hasNext();i++)
System.out.println(iter.next());
System.out.println("...");
System.out.println(words.size()+" distinct words. "+totalTime+" millisecond.");
}
}