There are some exceptions to the rules above. For example, occurs instead of unstressed or , word-initially or before another vowel in hiatus ("teatro", "reúne", "peão"). is often deleted entirely word-initially in the combination becoming . Also, , or appear in some unstressed syllables in EP, being marked in the lexicon, like "espetáculo" (spectacle) ; these occur from deletion of the final consonant in a closed syllable and from crasis. And there is some dialectal variation in the unstressed sounds: the northern and eastern accents of BP have low vowels in unstressed syllables, , instead of the high vowels . However, the Brazilian media tends to prefer the southern pronunciation. In any event, the general paradigm is a useful guide for pronunciation and spelling.