An opportunity for the seldom-used reset function to come into play: 
perl -le"for (1..2) { print for grep scalar(??../D/), ('A'..'F'); rese
+t}"

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Caution: Contents may have been coded under pressure.

In reply to Re^4: Flip-flop won't DWIM by Roy Johnson
in thread Flip-flop won't DWIM by wu-lee

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