CodeGolf: Find Unique Value

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LanguageRaku
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.BagHash.invert.Hash{1}.say for [[ 1, 1, 1, 2, 1, 1 ], [ 3, 5, 5, 5, 5 ], [ 9, 2, 9, 9, 9, 9, 9 ], [ 4, 4, 4, 6 ], [ 5, 8, 8 ], [ 8, 5, 8 ], [ 8, 8, 5 ] ];
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