Characters for combined consonant and vowel syllables then follow. The following are phonological differences in AAVE vowel and consonant sounds. They are divided into vowel and consonant alternations. Russian has vowel reduction in unstressed syllables. Vowels alliterate with any other vowel, as with and . Stems are classified by their last letters as vowel or consonant. A word has one syllable for every short vowel, long vowel, or diphthong. The consonant is restricted to positions adjacent to a vowel. The first complication is syllables that consist of just a vowel (V). All diphthongs end in a close vowel (). There are other languages that form lexical words without vowel sounds. The variation in the value of the initial open unstressed vowel is old. Most Turkish words do not only have vowel harmony for suffixes, but also internally. The vowel before it indicates grammatical case. The alveolar stop is pronounced as an affricate before the high front vowel .