Lab 4.2

Press Space: Create new sentence.
Press A: add new word to Article.
Press J: add new word to Adjective.
Press N: add new word to Noun.
Press V: add new word to Verb.
Press D: add new word to Adjective.
Press P: add new word to Preposition.
Press R: add new word to Proper noun.
Press X: Remove a word from a list.