# This has the user enter strings and
# counts the number of vowels in each string

done = False
while not done:
    s = input( "Give me a string: " )
    if s == "":
        done = True
    else:
        count = 0
        for letter in s:
            if letter.lower() in "aeiou":
                count = count + 1
        print( "'%s' has %d vowels."%(s, count))