Solve the NYT spelling bee. Mind you this isn't perfect.

panagram.py

#!/usr/bin/env python3
import sys

# called via `panagram.py ktocail`
# last letter in the word is required

def get_words(letters):
    # prevent dupes
    seen = set()

    check = set(list(letters))
    required = letters[-1]

    with open('/usr/share/dict/american-english') as f:
        for line in f:
            # strip out words with apostrophes
            word = line.strip().lower().split("'")[0]
            if len(word) >= 4 and word not in seen:
                if required in word and set(word).issubset(check):
                    seen.add(word)
                    if check == set(word):
                        print('PANAGRAM ', end='')
                    print(word)


if __name__ == '__main__':
    get_words(sys.argv[1])