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You open your mouth wide and yawn.~
$n opens $s mouth wide and yawns.~
You open your mouth wide and yawn at $N.~
$n opens $s mouth wide and yawns at $N.~
$n opens $s mouth wide and yawns at you.~
Who?~
You stifle a yawn and try to hide it.~
$n stifles a yawn and tries to hide it.~
