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Abstract

A word network is a set of words of a given length in which any two words differing by only one letter in a single position (such as aunt and runt, or hire and hare) are connected by a line. Using three lines, one can trace out a path leading from any word in a network to any other word in the same network. THe terminal words, together with the intermediate words in the path, form a word ladder, well-known since the days of Lewis Caroll. This article updates a number of recent articles in Word Ways describing the properties of four-letter word networks and ladders.

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