Word sums

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def letter_value(letter): """ >>> letter_value('A') 1 >>> letter_value('j') 10 >>> letter_value('!') 0 """ def word_value(word): """ >>> word_value('arm') 32 >>> word_value('BEND') 25 >>> word_value('elbow') 57 """ def is_word_sum(word1, word2, word3): """ >>> is_word_sum('arm', 'BEND', 'elbow') True >>> is_word_sum('KING', 'chair', 'THRONE') True >>> is_word_sum('Monty', 'Python', 'SHRUBBERY') False """ if __name__ == '__main__': import doctest doctest.testmod()