Contracted (Grade 2) braille is used by more experienced braille users. It uses the same letters, punctuation and numbers as uncontracted (Grade 1) braille but adds a series of special signs to represent common words or groups of letters, a bit like a kind of shorthand.
Books, magazines and other information tends to be produced in contracted braille, to cut down on size. Contracted braille produces much less bulky books and magazines.
If you enter “do not touch” in an online braille translator it produces the characters for
,d n t|*for some reason…Apparently it’s contracted braille.