7. Comment the following code, explaining what it does. Replace "here and there with meaningful strings. Try running it (easiest in a shell) and see if you are correct. import java.util.*; public class C { public static void main(String[] args) { Set s = new HashSet (); for (String a : args) if (!s.add(a)) System.out.println("here: + a); II System.out.println(s.size() + there: 11 + S); } }