The lexicon is arranged alphabetically with some slight deviations from common vowel order and place in the Greek alphabet ( including at each case the homophonous digraphs , e.g. αι , ει , οι , that had been previously , earlier in the history of Greek , distinct diphthongs or vowels ) according to a formerly common in many languages system that is called ἀντιστοιχία , antistoichia ; namely the letters follow phonetically in order of sound , in the pronunciation of the tenth century which is similar to that of Modern Greek .
The letters follow phonetically , in order of sound ( of course in the pronunciation of the tenth century , which is similar to that of modern Greek ) .