def longest_word(word1, word2, word3):

 def longest_word(word1, word2, word3):

    if len(word1) >= len(word2) and len(word1) >= len(word3):

        word = word1

    elif len(word2) >= len (word1) and len(word2) >= len(word3):

        word = word2

    else:

        word = word3

    return(word)

print(longest_word("chair", "couch", "table"))

print(longest_word("bed", "bath", "beyond"))

print(longest_word("laptop", "notebook", "desktop"))