The letter "ch" is a digraph consisting of the sequence of Latin alphabet graphemes C and H, however it is a single phoneme (pronounced as a voiceless velar fricative ) and represents a single entity in Czech collation order, inserted between "H" and "I". In capitalized form, "Ch" is used at the beginning of a sentence ("Chechtal se." "He giggled."), while "CH" or "Ch" can be used for standalone letter in lists etc. and only fully capitalized "CH" is used when the letter is a part of an abbreviation (e.g. "CHKO Beskydy") and in all-uppercase texts.