English has letters that can be vowels. This includes Y, which can be either a consonant or a vowel; for this problem, we'll consider Y a consonant. The other English letters always consonants. How many two-letter "words" can we make from these letters if we are required to use at least one vowel?
+36916 first letter consonant 21 x 5
second letter consonant 5 x 21
both letters different vowels (different or alike) 5 x 5
105 + 105 + 25 = 235 'words' with at LEAST one vowel
