Kids' Cryptography with a Key from a Wallpaper Group
Solve a wallpaper group puzzle to find a key to a cryptogram. Plain text is a word in a natural language, while a cryptogram is in symbolic language. The symbolic language is based on a Boolean ring.
 E. Price. "wordlist.10000." (Jun 14, 2023) www.mit.edu/~ecprice/wordlist.10000.