Question: A word can be changed to another word by a 1-character substitution. Assume that a dictionary of 5-letter words exists. Given an algorithm to determine

A word can be changed to another word by a 1-character substitution. Assume that a dictionary of 5-letter words exists. Given an algorithm to determine of a word A can be transformed to a word B by a series of 1-character substitutions, and if so, outputs the corresponding sequence of words. Note that all intermediate words must be in the dictionary.

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