AEIOUY and sometimes W?

Have you ever thought about the plural form of bus? Is it buses, or busses? Did you know that the word buss (yes with a double s, it is in dialect form) means a big sloppy kiss? The plural form of buss is busses. So next time you are writing the word bus plural...make sure you get the correct form!
Now for the real content of the grammar lesson...Vowels we have heard them and learned about them since we were little kids. We sang song about AEIOU and sometime Y, but what about W? Can/is W a vowel?
The letter W came late to the Roman alphabet. The emperor Claudius tried to give W a start during the alphabet reform, but was dropped after his death. There were rumors that the W only served as a Whim for the emperor not the common good. Bottom line here is the rule...W is only a vowel when it is part of a diphthong. Look for it in the middle of the syllable. So to end here is an example how W is used as a vowel. The word is Cwm and is pronounced coom.