longestWord

# -*- coding:Utf-8 -*-
with open("D:/tmp/The Adventures of Sherlock Holmes.txt") as f:
    text = f.read()

wordDict = {}

for i in text.split(" "):
    wordLen = len(i)
    if not wordLen in wordDict:
        wordDict[wordLen] = []

    wordDict[wordLen].append(i)

print [wordDict[n][0] for n in sorted(wordDict, reverse=True)][:3]