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Start with these three words in order: MULE PITS RANK. The goal is to swap letters that have an identical place in the word, while still keeping the resulting strings as words, and eventually get PITS MULE RANK. What is the smallest number of swaps that can be used to do this?

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  • $\begingroup$ The answer is even. $\endgroup$
    – mathlander
    Dec 22, 2022 at 1:04

1 Answer 1

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Total: 4 swaps

MULE PITS RANK

MILE PUTS RANK

PILE MUTS RANK

PILS MUTE RANK

PITS MULE RANK

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    $\begingroup$ Of the six words you form, one is not in the Oxford English Dictionary and another is in but only as a proper noun. $\endgroup$
    – Gareth McCaughan
    Dec 19, 2022 at 20:57

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