In addition to his famous creations portrayed in "Alice's Adventures in Wonderland," Lewis Carroll was known for his fondness of word puzzles and logic games.
In 1879, Carroll noted in his diary that he had created a new type of word puzzle he called “syzygies.” The objective was to turn one word into another by changing letters according to logical rules. For example, “walrus” can be turned into “carpenter,” like so:
walrus
(rus)
peruse
(per)
harper
(arpe)
carpenter
https:// www.livescience.com/51437-how-lewis-carroll-s-syzygy-puzzles-worked-infographic.html