import string

f = open("msnd.txt", "r")

myLetters = {}

totalLetters = 0

letter = f.read(1)
letter = letter.lower()
while( len(letter) > 0):

    if ( letter in string.lowercase  ):
        totalLetters = totalLetters + 1
        if ( myLetters.has_key(letter) ):
            myLetters[letter] = myLetters[letter] + 1
        else:
            myLetters[letter] = 1

    letter = f.read(1)
    letter = letter.lower()

f.close()
print "All done!, Total letters is:", totalLetters


newList = []

for item in myLetters.keys():
    percent = 100 * ( myLetters[item] / float(totalLetters))
    newList.append(   (percent, item)     )


newList.sort()
newList.reverse()


for myTuple in newList:
    p = myTuple[0]
    l = myTuple[1]
    print l, " - ", p