21. Sometimes these digraphs are even considered as special letters of respective alphabets. 22. Ligatures may also not separate digraphs or diphthongs in print. 23. The resulting digraph is called U-rooted factorial connection. 24. These digraphs are considered single letters in the alphabet. 25. In occasional words, letters that normally form a digraph are pronounced separately. 26. For languages with Hungarian, the game features separate tiles for those digraphs . 27. This is because the digraph marks a preceding short vowel in High German. 28. Most notably, a Playfair digraph and its reverse ( e . g. 29. However, digraphs are useful in communication with other parts of the world. 30. Another commonly encountered alphabetic tradition was originally created for the transcription of digraphs . 