Here is a disoriented 14 hiding another, correctly oriented 14.

In CREBhead symbolism, BK means "BacKward,:" and UD means "Upside Down."

So this piece, when specifics are desired, would be written as:

BK1 UD4(14)...

or in CREBspeak, this is,"B K 1 U D 4 hide 14."