MOUTH CHART (frames 1-9 on the Mouth layer)
1 X rest
2 A  M B P (closed)
3 B  K S T EE and most consonants (teeth)
4 C  EH AE (open)
5 D  AA (wide open)
6 E  AO ER (round)
7 F  OO W (pucker)
8 G  F V (teeth on lower lip)
9 H  L (tongue up)
Tip: change the mouth 1 frame before the sound. Spell by sound, not letters: "through" = B E F.
