Today's gag is based on a Cold War Era joke.
The Prague Circus is playing in Vienna. One of the performers, a little person acrobat, or midget as he would have been called then, has planned an escape to the West. He leaves the guarded hotel at night, climbing down the drain pipe to the street, and hurries away to a house where he has been told that he can hide. He knocks on the door. The door opens a crack, and the little man whispers, "Pardon me, but can you cache a small Czexh?"