Letters: Lips, Teeth, Tongue, Roof of Mouth.

Lips touch: B, M, P, W, Y(?)
Teeth touch lip: F, V
Tongue/teeth touch: B, E, W
Tongue touches roof of mouth: D, L, N, T, W
Teeth touch: J(?), Z(?)
Lips go out: G, J, O, Q, U, W, Y