Monkey Typewriter

https://en.wikipedia.org/wiki/Infinite_monkey_theorem

1 hour project on sudden inspiration to make the monkey typewriter thing. Generates random letters until the letters made is the sentence wanted. If you don't put a custom sentence then the default is the first line of "Romeo and Juliet" (Two households both alike in dignity).

Only use English letters because I didn't want to code for numbers or special characters.