If you spend enough time online, you're bound to come come across a sentence like this: "Yr brn cn rd wrds wtht vwls." It looks like nonsense at first glance, but after a moment, you probably read it ...

a, e, i, o, u. 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 ...