In the February 2003 Word Ways, the HeptCat Perspicuous Palindrome Producer was introduced as a device for the semi-automatic generation of over 200 billion different palindromic sentences. But that is not the HeptCat's only palindromical talent; this cat of seven segments also has the latent ability to engender indefinitely long, grammatical, multi-sentence passages that are end-to-end palindromes.
"The Heptcat's Other Trick,"
Word Ways: Vol. 36
, Article 14.
Available at: https://digitalcommons.butler.edu/wordways/vol36/iss3/14