Well, we know Jack the S can type. Right answer.

If you use one of the fonts mentioned, upside down it really does read pretty clearly.

Apologies for the really simple input. When these were popular no self-respecting one-uppist showing off his new calculator would have used an input string without at least a couple of SQRT and a (TANH-SIN/SINH) at a bare minimum, but this was just to show method.

John