That's an interesting problem. I'm actually somewhat glad you came across it (and managed to figure it out); it will add something for me to think about in future troubleshooting for this issue.
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たしかにひとつのじだいがおわるのお
ぼくはこのめでみたよ
だけどつぎがじぶんおばんだってことわ
しりたくなかったんだ
It's my turn next.
Shakespeare liked regexes too!
/(bb|[^b]{2})/
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