#!/usr/bin/python

words = {}

f = open('ocap.txt','r')
for line in f:
   for word in line.split():

      # I am sure that there is a better way to do this, 
      # but it might depend on the version of python.
      tmp = ""
      for letter in word.lower():
         if letter >= 'a' and letter <= 'z': 
	     tmp = tmp + letter
      word = tmp


      if word in words:
         words[word] +=1
      else:
         words[word] = 1

print words

count = 0;
for key in words.keys():
    if words[key] > count:
       count = words[key]

print "Most frequent word appears ", count, 'times'
for key in words.keys():
    if words[key] == count:
       print key

# a tiny bit of googling to get this
import operator
for item in  sorted(words.items(), key=operator.itemgetter(1)):
   print "%15s"%item[0],": ","%4d"% item[1]