File to analyze: Raw contents, for debugging - don't print this out in your final solution
['Mary', 'had', 'a', 'little', 'lamb,', 'little', 'lamb,', 'little', 'lamb.', 'Mary', 'had', 'a', 'little', 'lamb', 'whose', 'fleece', 'was', 'white', 'as', 'snow.']
Contents after separating out punctuation, for debugging  - don't print this out in your final solution
['Mary', 'had', 'a', 'little', 'lamb', ',', 'little', 'lamb', ',', 'little', 'lamb', '.', 'Mary', 'had', 'a', 'little', 'lamb', 'whose', 'fleece', 'was', 'white', 'as', 'snow', '.']
The valid commands are:
stats, vocab
Please enter a command: Number of distinct words:  11
Number of words:  20
Average word length:  4.05
Number of sentences:  2
Average sentence length:  10.0
ARI:  2.65