- Round top?
yes - go to 2
no => F
- Long face?
yes - go to 3
no - go to 4
- Horns?
yes => G
no - go to 5
- Flat face?
yes => D
no => H
- One eye?
yes - go to 6
no - go to 7
- Hair?
yes => J
no => C
- White skin?
yes - go to 8
no => A
- Orange eyes?
yes - go to 9
no => B
- Ears?
yes => E
no => I
Note:
- Keys should be unique to a clade;
e.g. orange eyes should occur only within long face.
- Keys should not be repeated;
e.g. long face should not be asked twice