import java.util.*;

public class MapSetExample {

    public static void main (String[] argv)
    {
        setExample ();
        mapExample ();
    }

    static void setExample ()
    {
        // Example: use strings or numbers.

        // INSERT YOUR CODE HERE.
    }

    static void mapExample ()
    {
        // Example: use a map from numbers to strings.

        // INSERT YOUR CODE HERE.
    }

}