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. For letters of the third decade (u, y, z), which already have a dot 6, the derivation is a mirror image. Ó is derived from u, which is how it is pronounced (also, the mirror image of o is already taken). Several of these conventions are used in Lithuanian Braille.

History
Some form of a Braille alphabet had been adapted to the Polish language by 1957.

Alphabet
The full alphabet is this:

Print digraphs in z are written as two letters in braille as well: cz,  rz,  sz.

Punctuation

 * Paired punctuation