For the letter assignment I've put together a short slide show (just hit the play button above) with the following letters:
P, V, N, H, J, O, X, L, E, Q, C, U, T, W, & S. Dennis was right, B's are hard to find. Found a couple that sorta looked like B's, but not quite enough to make the list. T's, L's & X's were everywhere!
The E on the right (cloud- E) gets an honorable mention. Definitely looks like an E to me, but the jury was out among my peers.