Answer:
A, E, I, O, U, and sometimes W and Y. It is said that Y is "sometimes" a vowel, because the letter Y represents both vowel and consonant sounds. In the words cry, sky, fly, my and why, letter Y represents the vowel sound /aɪ/. In words like myth and synchronize, Y represents the vowel sound /ɪ/.
Step-by-step explanation: