It's invisible

And the Joker will reliably and quickly lead you to effects that will have a particularly lasting impact on your audience

The spectator chooses any letter

This happens:

he finally lifts the outer opaque tube

Money Miracles | Michael Ammar Vol. 1 - (DVD) Hauchglas It's invisible"The best, most memorable, and most influential coin and currency mysteries of the past fifty years!" Jon Racherbaumer A rich collection of powerful money magic both new and classic. World Champion magician Michael Ammar has assembled the very best of the practical yet astonishing routines using coins and currency ever shown on video. This is any time, any place magic which you can use to astonish spectators anywhere! Volume One 41 Cent Miracle