I have broken the code. It starts out: “There once was a Frenchman in Brittany...”
It says, “See other side for instructions” on BOTH sides.
It’s a fiendishly clever Moebius rock!
An anonymous freeper has issued a limerick challenge. Here is the freeper’s offering. Can you top it? Let’s try to keep it SFW (safe for work).
There once was a Frenchman from Brittaney,
Who was such a poor shot he couldn’t hit any.
Then a Viking lass came ashore,
She wanted a hug, a kiss, and more.
The story ends with children — many!