Word Ladders
A word ladder is a sequence of words in which only one letter changes at each step. Theoretically, the shortest possible ladder with n-letter words, and no matching letters, is n+1 steps. For example:
boy bay may man
Hardest four-letter ladders
The hardest 4-letter ladders I've found have 17 steps:
anew knew know snow show shod shed seed deed dyed dyes eyes eves even oven omen amen
knee knew know snow show shod shed seed deed dyed dyes eyes eves even oven omen amen
Hardest three-letter ladders
The longest word ladders I've found with three-letter words:
ivy icy ice ace act ant and end
ivy icy ice ace act apt opt ops ups
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