import random

dictionary = [word.strip() for word in open('/usr/share/dict/words')]

averages = []

repeatCount = 100
wordCount = 1000000

for i in xrange(repeatCount):
	characters = 0.0
	for j in xrange(wordCount):
		characters += len(dictionary[random.randint(0, len(dictionary)-1)])
	averages.append(characters/wordCount)

overallAverage = sum(averages) / repeatCount

print overallAverage