When I introduced the concept of Triplets in "Pears Word Games" the emphasis was upon witty word transformations such as turning WATER into WINE as featured in the February 1991 Kickshaws. In addition I deomonstrated the dramatic shapes one could achieve such as that illustrated alongside which builds up from a valid single-letter word to the largest word possible and returns to a different single-letter word without repeating any word. Yet a third type was featured which is of no consequence to this discussion but all three had the factors in common of being single-word transformations without any restriction upon the number of intermediate stages.
"Triplets: An Added Dimension,"
Word Ways: Vol. 24
, Article 6.
Available at: https://digitalcommons.butler.edu/wordways/vol24/iss4/6