Possible exceptions, Chadwick goes on to explain, include the two diphthongs,  ("ai") and  ("au"), as in , "ai-ku-pi-ti-jo", for "Aiguptios" (, "Egyptian") and , "au-ke-wa", for "Augewās" ( "Augeas"). However, a diphthong is by definition two vowels united into a single sound and therefore might be typed as just V. Thus  ("rai"), as in , "e-rai-wo", for "elaiwon" (), is of the type CV. Diphthongs are otherwise treated as two monosyllables: , "a-ro-u-ra", for "arourans" (accusative plural of , "tamarisk trees"), of the types CV and V. Lengths of vowels and accents are not marked.