When is y a constanant?
The Y is a consonant for its general pronunciation, which is
when Y starts a word, the Y starts a syllable or the following
letter of Y is a vowel. If the Y ends a word, it's somewhere inside
a syllable or inside a syllable intervention, especially without a
surrounding vowel in one syllable like "byte", or if the following
letter of Y is a consonant, then that's when Y becomes a vowel. If
the following letter is a consonant, the reason why Y would become
a vowel is because Y can't be a consonant blend. However, Y is not
a vowel for its general pronunciation nor in the phonetic
alphabets.