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In doublet puzzles, two words are given, of the same length - a start word
and an end word.
In solving the puzzle you must go from the start to end word by interposing
other words, each of which must differ from the previous word by one letter
only.
Thus, one letter must be changed in the start word to give another word -
and so on until the end word is achieved. This must be done in the given
number of steps.
BANK
-
B A N K
x x x x
x x x x
x x x x
x x x x
L O A N
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