Word ladder
Word game / From Wikipedia, the free encyclopedia
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Word ladder (also known as Doublets,[1] word-links, change-the-word puzzles, paragrams, laddergrams,[2] or word golf) is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and to solve the puzzle one must find a chain of other words to link the two, in which two adjacent words (that is, words in successive steps) differ by one letter.[3]