new_contents: def count_vowels(string):
  	vowels = ['a', 'e', 'i', 'o', 'u']
  
  	list = {'a':0, 'e':0, 'i':0, 'o':0, 'u':0}
  
  	for letter in string.lower():
  		if letter in vowels:
  			list[letter]+=1
  
  	print "There are %d a's, %d e's, %d i's, %d o's and %d u's in %s" % (list["a"], list["e"], list["i"], list["o"], list["u"], string)
  
  # test
  count_vowels("Hello world")
  
subject: Create countVowel.py