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 ...
In an English dictionary you'll find ... the third letters are different (‘g’ and ‘l’). The letter ‘g’ comes before ‘l’ in the alphabet, so you'll find ‘dog’ before ‘dolly ...