Yunikoodo (=Unicode) ni wa kumi-awase-you no Moji to naka ni Daiereshisu (=Diaeresis) to Ringu (=Ring) ga ari-masu. Korera wo tsukatte Dakuon to Han-Dakuon wo shimeshite mi-masu. B Ḧ Ḧ b ḧ ḧ D T̈ T̈ d ẗ ẗ G K…