as well as the start/stop character.

The two wide bars, out of five possible positions, encode a number between 1 and 10 using a two-out-of-five code with the following numeric equivalence: 1, 2, 4, 7, 0. The numbers are summed together. For example, the number 6 is encoded NWWNN, with wide bars occupying the positions for 2 and 4 (2+4=6). In the case of NNWWN which is it is assigned to 0 for digits (+0), and 10 for the letter columns (+10 - +30). When encoding the (+10 to +30) letters