| Letter / Llythyren | % Correct |
|---|---|
| a | 100%
|
| b | 100%
|
| c | 100%
|
| d | 96%
|
| e | 95%
|
| f | 95%
|
| g | 95%
|
| dd | 93%
|
| ff | 93%
|
| ch | 89%
|
| h | 88%
|
| i | 88%
|
| l | 88%
|
| ll | 87%
|
| m | 87%
|
| n | 87%
|
| o | 87%
|
| p | 87%
|
| j | 86%
|
| r | 86%
|
| y | 86%
|
| s | 85%
|
| t | 85%
|
| w | 84%
|
| u | 83%
|
| rh | 81%
|
| th | 78%
|
| ph | 77%
|
| ng | 70%
|