Ok, take any size piece of paper and write the letter
"Z" on it.
Next, scoot your chair just far enough away from the table or desk so that you can lift one (either) foot a couple inches or so off the floor. Now, scribe an
"0" with that foot in a simple circular "clockwise" motion.
Finally, while keeping the
foot moving in the clockwise rotation simple
scribe the "6" in the air with your finger!
That is a Z06 challenge.
Honestly, who could do it?