English Braille, also known as Grade-2 Braille, is the braille alphabet used for English. It consists of 250 or so letters (phonograms), numerals, punctuation marks, formatting marks, contractions, and abbreviations (logograms). Some English Braille letters, such as ⠡ ⟨ch⟩, correspond to more than one letter in print. Braille was originally intended, and is frequently portrayed, as a re-encoding of the English orthography that is used by sighted people. However, for the blind, braille is an independent writing system, not a variant of the printed English alphabet.