Students are expected to use their phonetic knowledge to correctly spell words that have the same sound represented by different letters. The letter r has a hard sound in the initial position of words, for example ratón, red, rizo, rosa, or ruso. This sound is also present when the r follows the consonants n, s, and l. For example, Enrique, Israel, or alrededor. The digraph rr, which is always located between vowels, also represents this sound. For example, carro, gorra, fierro, or ferrocarril. The soft sound of r is made when this letter is in the middle of a word, like in barba, sartén, and marco or between vowels, like in the words, cara, arete, or Mario. The soft sound of r is also present in words where this letter follows the consonants b, c, d, f, g, p, and t, like in broma, creo, dragón, frente, gracias, primero, and tres.