On the Subject of Braille
This doesn’t feel right.
Braille consists of raised dots arranged in a regular grid. Each letter has 2×3 locations, each of which can have a raised dot or not. The following table shows the encoding for Unified English Braille.
Cheatsheet:
a | b | c | d | e | f | g | h | i | j
|
k | l | m | n | o | p | q | r | s | t
|
u | v | w | x | y | z | and | for | the | with
|
ar | bb | cc | ch | ea | ed | en | er | ff | gg
|
gh | in | ing | of | ou | ow | sh | st | th | wh
|
Move your finger over the module to feel the Braille message. The message consists of 4 Braille letters. However, some of the raised dots may be extraneous and some may be missing. To find out which locations are wrong, proceed as follows:
- The locations are numbered in columns from top to bottom, then left to right. The top left location of the first (leftmost) letter is location 1. The one below it is location 2 and the one to its right is location 4.
- Start at location 1. For each character in the serial number, skip that many locations, converting letters to numbers by their alphabetic positions (A=1, …, Z=26). Wherever you land, change a raised dot to an absent one and vice versa, then move to the next location.
1 14 2345 346 | 145 1 2345 346 | 125 2 145 346 | 134 2 1345 346 | 234 12456 1236 12456 |
1 24 134 346 | 145 2 123 12456 | 125 2 1235 346 | 134 35 12456 234 | 146 1 13 346 |
345 2345 24 34 | 15 1 2345 346 | 125 2 2345 346 | 1345 2 1235 12456 | 234 1256 126 2345 |
1 234 13 346 | 15 24 126 1456 | 125 24 126 12456 | 1234 345 24 146 | 34 1 13456 346 |
12 2 1235 346 | 124 345 134 12456 | 35 234 24 34 | 1234 345 13 12456 | 34 1235 12346 234 |
12 2 2345 346 | 124 345 134 346 | 123 1 34 1246 | 1234 345 13 346 | 34 1235 346 234 |
12 15 346 234 | 124 1 34 12456 | 123 1 13456 346 | 1234 1 13456 346 | 2345 2 16 346 |
12 35 145 346 | 124 1 2346 1235 | 123 2 145 12456 | 1234 246 12456 234 | 2345 26 145 1246 |
12 1256 126 2345 | 124 35 145 346 | 123 2 145 346 | 1234 136 146 1246 | 2345 26 145 12456 |
12 135 1346 346 | 124 35 15 34 | 123 2 1345 1246 | 1234 136 146 346 | 2345 15 34 346 |
12 1235 2 16 | 124 35 24 146 | 123 2 1345 346 | 1235 1 2346 1235 | 1456 1235 246 346 |
12 1235 2 34 | 124 123 13456 346 | 123 2 1236 346 | 1235 2 16 346 | 2345 246 12456 234 |
12 1235 2 1456 | 124 135 34 12456 | 123 35 13 346 | 1235 2 145 12456 | 1236 15 34 1246 |
12 1235 2 2346 | 124 1256 126 2345 | 123 24 34 1246 | 1235 2 145 346 | 2456 345 1345 1246 |
12 1235 346 346 | 1245 1 35 346 | 123 24 34 26 | 1235 15 34 346 | 2456 345 1345 346 |
12 1235 346 234 | 1245 1 2346 1235 | 123 24 1236 346 | 1235 24 145 346 | 2456 2 13 12456 |
14 345 12456 234 | 1245 1 1356 346 | 134 1 13 346 | 1235 136 146 1246 | 2456 2 123 1456 |
14 345 2345 12456 | 1245 26 145 12456 | 134 345 13 1246 | 1235 136 146 346 | 2456 35 1345 12456 |
16 345 2345 12456 | 1245 1235 246 346 | 134 345 13 346 | 234 1 13456 346 | 2456 35 1345 346 |
14 1235 13456 346 | 125 2 145 1246 | 134 1 34 12456 | 234 12456 1236 1246 | 2456 35 2345 12456 |