One way to organize a collection of words is to use an array of sorted lists. The array contains one sorted list for each letter of the alphabet. To add a word to this data structure, you add it to the sorted list that corresponds to the word's first letter. Design an ADT for such a collection, including the operations add and contains. Define a Java interface for your ADT. Then implement your interface as a class and test it. Use a text file of words to populate your data structure.