Ge'ez Keyboard
For the othe letters add u or i,or e. Example:
on ህ add u to get ሁ
ህi --> ሂ
ህa -->ሃ
ህe--> ሀ
ህee --> ሄ
ህE --> ሄ
ህo -->ሆ
ህW -->ኋ