"# WordCounting"

Implement an utility program for counting words that includes specific letters.

Program should do:

• loan a vocabulary (append or replace).

• add a new word to vocabulary.

• find exact number of words that contain provided letters (a word should contain all letters)

• (optional) show words that contain provided letters (think of how a user would want to see a list of words, e.g. don’t show 100500 words if he inputs just one letter.