Tyun, Tyown, or Tiwn (majuscule: ÃÂ; minuscule: ÿ; ; Classical Armenian: ÿëÃÂö) is the thirty-first letter of the Armenian alphabet. It represents the voiceless alveolar plosive /t/àin Eastern Armenian and the voiced alveolar plosive /d/ in Western Armenian. It is typically romanized with the letter T (or D, depending on the dialect). Created by Mesrop Mashtots in the 5th century, it has a numerical value of 4000. The uppercase àis similar to the Latin uppercase S, whilst the lowercase ÿ is like a ligature of the lowercase u and n.