Howmanywayscanapersonvisit3cities,eachofthem4timessuchthathestartsandendsat different cities?
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Howmanywayscanapersonvisit3cities,eachofthem4timessuchthathestartsandendsat different cities?
Howmanywayscanapersonvisit3cities,eachofthem4timessuchthathestartsandendsatdifferent cities?