InterviewSolution
`{:(A" "B" "C" "D),(1" "2" "3" "4):}``{:(A" "B" "C" "D),(3" "1" "2" "4):}``{:(A" "B" "C" "D),(4" "1" "2" "3):}``{:(A" "B" "C" "D),(4" "3" "2" "1):}`
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