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Ef or Fe (Ф ф; italics: Ф ф or Ф ф; italics: Ф ф) is a Cyrillic letter, commonly representing the voiceless labiodental fricative /f/, like the pronunciation of ⟨f⟩ in fill, flee or fall. The Cyrillic letter Ef is romanized as ⟨f⟩.
