import java.util.*;

// A brief review of how to use, iterate through, and
// remove from sets/maps.
public class SetMapReview {
    public static void main(String[] args) {
        // Create a set of Strings, add some strings
        Set<String> s = new HashSet<String>();
        s.add("Melissa");
        s.add("Adam");
        s.add("Martin");
        
        // Print out each string on its own line
        for (String name : s) {
            System.out.println(name);
        }
        
        // Create a map of the strings to their length.
        Map<String, Integer> lengths = new HashMap<String, Integer>();
        for (String name : s) {
            lengths.put(name, name.length());
        }
        
        // Remove any strings from the map of even length
        Iterator<String> iter = lengths.keySet().iterator();
        while (iter.hasNext()) {
            String name = iter.next();
            if (name.length() % 2 == 0) {
                iter.remove();
            }
        }
    }
}