6 and 7

- Word:
* isLowerCase();
* toLowerCase();
* compareTo();
* vowelPerLetter();
* calculateVowelPerLetter();

- Character:
* isLowerCase();
* toLowerCase();
* compareTo();
* isVowel();

- Paragraph:
* asText();

- TextLogic:
* getWordsSortedByLettersAsParagraph();
* getWords();
* sortWordsByLetters();
* getAsParagraph();
* getWordsAsSentence();