| After the initial letter S |
| For second letter: | a | ch | e | h i | m o p | t | u |
| use number: | 2 | 3 | 4 | 5 | 6 | 7-8 | 9 |
|
| After the initial letters Qu |
| For second letter: | a | e | i | o | r | y |
| use number: | 3 | 4 | 5 | 6 | 7 | 9 |
|
| After other initial consonants |
| For second letter: | a | e | i | o | r | u |
| use number: | 3 | 4 | 5 | 6 | 7 | 8 |
|
| After initial vowels |
| For second letter: | b | d | l m | n | p | r | s t |
| use number: | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|
| |
| Additional letters: | a-d | e-h | i-l | m | n-q | r-t | u-w | x-z |
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|
