wondering what to do next, when suddenly a footman in livery came
running out of the wood--(she considered him to be a footman
because he was in livery:  otherwise, judging by his face only,
she would have called him a fish)--and rapped loudly at the door
with his knuckles.  It was opened by another footman in livery,
with a round face, and large eyes like a frog; and both footmen,

wondering what to do next, when suddenly a footman in livery came
running out of the wood--(she considered him to be a footman
because he was in livery:  otherwise, judging by his face only,
she would have called him a fish)--and rapped loudly at the door
with his knuckles.  It was opened by another footman in livery,
with a round face, and large eyes like a frog; and both footmen,

         * a key that appears once in `right` might appear multiple times in `left`). We don't
         * guarantee behavior in that case, anyway, and the current behavior is likely undesirable.
         * So that's either a reason to feel free to change it or a reason to not bother thinking
         * further about this.
         */