working with cell pairs rather than single cells.
====
-.Word: 2SWAP
-[caption='Definition concept {counter:exec}: ']
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-: 2SWAP 3 ROLL 3 ROOL ;
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+.Definition concept for 2SWAP
+****
+( v1 v2 v3 v4 -- v3 v4 v1 v2 ) : 2SWAP 3 ROLL 3 ROLL ;
+****
====