Vowels are constructed from only a handful of basic symbols .
Vowels can be combined with other vowel forms and semi-vowels to represent the full repertoire of diphthongs and triphthongs used in the language .
Vowels are constructed from only a handful of basic symbols , but they can be combined with other vowel forms and semi-vowels to represent the full repertoire of diphthongs and triphthongs used in the language .