@@ -19,10 +19,14 @@ for line in a:

 	out = []

 	for window in window_iterate(line):

 		if window[0] in set(['a', 'an']):

-			if any(window[1].startswith(vowel) for vowel in 'aeiouh'):

-				window[0] = 'an'

+			if any(window[1].startswith(vowel) for vowel in 'aeiou'):

+				if window[0] != 'an':

+					if raw_input('change article in %r? ' % ' '.join(window)).lower().startswith('y'):

+						window[0] = 'an'

 			else:

-				window[0] = 'a'

+				if window[0] != 'a':

+					if raw_input('change article in %r? ' % ' '.join(window)).lower().startswith('y'):

+						window[0] = 'a'

 		out.append(window[0])

 	print(' '.join(out))