If you’re doing this on a computer, you might find it useful to copy this page into a programme like paint, so you can draw in the symbols when you work out which letter they are.

Need some help? Click these links for some hints – hint 1 will give you an initial nudge, hint 2 will help a bit more and the answer will spell out exactly how to solve the puzzle.

Click here to go to the previous question, or the next question.