#alphabet  a character set that includes letters
  supertype:  character_set__characterset  an ordered list of characters that are used together in writing or printing
  subtype:  phonetic_alphabet  manual_alphabet
  instance:  Roman_alphabet  Hebrew_alphabet  Greek_alphabet  Cyrillic_alphabet  Arabic_alphabet
  member:  letter_of_the_alphabet__letter__alphabetic_character  the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"

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