public class StreamPuzzles
{
    public static void main(String[] args)
    {
    }
    /**
     * this uses stream operations to filter all
     * duplicates of of a wordlist file and to place it in a
     * List<String>
     */
    public static ArrayList<String> noDuplicates(String fileName)
    {
    }
    //this verson does not use streams
    public static ArrayList<String> noDuplicates1(String fileName)
    {
    }
    /**
     * find the first n words in a file beginning with
     * the character ch and place them in a
     * list of strings.
     */
    public static List<String> findFirstN(String fileName, char ch, int n)
    {
    }
    //no streams version
    public static List<String> findFirstN(String fileName, char ch, int n)
    {
    }
    /**   
     * removes all nonwhitespace, nonalphanumeric characters
     * from the contents of a file and places it in a filen
     * named fileName.out.
     */
    public static vood depunct(String fileName)
    {

    }
    /**
     * Extracts all distinct words used in a file and places
     * them in a file named fileName.voc
     */
    public static void vocabulary(String fileName)
    {
    }
}