Consonants are the rest of the letters in the alphabet: b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y and z The letter 'y' is a bit different, because ...

This interplay between accent and vowels / consonants was treated as a word-internal matter, the default assumption being that every word in Hittite was accented, but that per word it has to be ...