Polish Braille
Polish Braille (alfabet Braille'a) is a braille alphabet for writing the Polish language. It is based on international braille conventions, with the following extensions: That is, for letters of the first and second decade of the braille script (a, c, e, l, n, s), a diacritic is written as dot 6, and any dot 3 is removed (or, equivalently, is moved to position 6)—that is, the base letter is moved to the fourth decade.