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You stare vacantly off at nothing.~
$n stares vacantly off at nothing.~
You stare at $M vacantly.~
$n stares vacantly at $N.~
$n stares vacantly at you.~
Knock knock..anyone home?~
A vacuous look falls across your face, you are as sharp as a tack aren't you.~
A vacuous look is on $n's face, sharp as a tack isn't $e.~