There are some symbols that if we read them upside down another letter is formed. For example (.-) and (-.). Dividing them into this category helps us to memorize them more easily because if we do not remember a letter and we remember its couple we can find out it. So let's look at the pairs we have:
| A | N |
|---|---|
| B | V |
| D | U |
| F | L |
| G | W |
| Q | Y |
So if we know that (A) is (.-) we can find what symbol is (N) that obviously is (-.). Let’s look the following table:
| PAIR | LETTER 1 | SYMBOL 1 | LETTER 2 | SYMBOL 2 |
|---|---|---|---|---|
| 1 | A | . - | N | - . |
| 2 | B | - . . . | V | . . . - |
| 3 | D | - . . | U | . . - |
| 4 | F | . . - . | L | . - . . |
| 5 | G | - - . | W | . - - |
| 6 | Q | - - . - | Y | - . - - |