State name puzzle: Difference between revisions
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→{{header|Mathematica}}
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end itemsToChars</lang>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<lang Mathematica>letters[words_,n_] := Sort[Flatten[Characters /@ Take[words,n]]];
groupSameQ[g1_, g2_] := Sort /@ Partition[g1, 2] === Sort /@ Partition[g2, 2];
permutations[{a_, b_, c_, d_}] = Union[Permutations[{a, b, c, d}], SameTest -> groupSameQ];
▲ permutations /@
Subsets[Union[ToLowerCase/@{"Alabama", "Alaska", "Arizona", "Arkansas", "California", "Colorado", "Connecticut", "Delaware", "Florida",
"Georgia", "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas", "Kentucky", "Louisiana", "Maine", "Maryland",
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