To perform stemming, we instantiate SnowballStemmer from the nltk library, call its .stem() method on each token and display modified tokens:

from nltk.stem.snowball import SnowballStemmer
stemmer = SnowballStemmer('english')
[(word, stemmer.stem(word)) for i, word in enumerate(parsed_body.words)
    if word.lower() != stemmer.stem(parsed_body.words[i])]
[('Andy', 'andi'),
('faces', 'face'),
('tenure', 'tenur'),
('tries', 'tri'),
('winning', 'win'),