Exam 1z0-851 topic 1 question 75 discussion

Given:
import java.util.*;
public class Explorer1 {
public static void main(String[] args) {
TreeSet<Integer> s = new TreeSet<Integer>();
TreeSet<Integer> subs = new TreeSet<Integer>();
for(int i = 606; i < 613; i++)
if(i%2 == 0) s.add(i);
subs = (TreeSet)s.subSet(608, true, 611, true);
s.add(609);
System.out.println(s + " " + subs);
}
}
What is the result?