Scope and limitations:

Greek:
The only lower case letters needed for SIL Greek transliteration are
eta and omega, represented by e and o with macron above, respectively.

This keyboard should not be used for upper case Greek letters,
since some of the upper case characters are need for the Hebrew.

Hebrew:
This keyboard generates all the combinations of base character 
plus diacritic(s) need for the SIL Hebrew transliteration.
