the followinga are downloaded using nltk.download()
markov/abc_rural.txt
markov/abc_science.txt
markov/europal_raw_ep-00-01-17.en
markov/europal_raw_ep-00-01-18.en
markov/europal_raw_ep-00-01-19.en
markov/europal_raw_ep-00-01-21.en
markov/europal_raw_ep-00-02-02.en
markov/europal_raw_ep-00-02-03.en
markov/europal_raw_ep-00-02-14.en
markov/europal_raw_ep-00-02-15.en
markov/europal_raw_ep-00-02-16.en
markov/europal_raw_ep-00-02-17.en
markov/genesis_english-web.txt
following are downloaded from https://gutenberg.org
poems_of_love_by_ella_wheeler_wilcox.txt
poems_of_life_by_ella_wheeler_wilcox.txt
following are downloaded from https://github.com/dwyl/english-words
words.txt (words_alpha.txt)
words_non_alpha.txt (words.txt)
sentences.txt is taken from https://github.com/divaamahajan/K-Most-Popular-Words