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Replace the glass windows with concrete
You've fixed the cracking problem, but it's awfully dark in here!

 Replace the glass windows with concrete = Wrong

Concrete walls will certainly strengthen this unstable cathedral, but they'll also block the sunlight. Everyone loved and admired the beautiful stained glass windows. You can bet they won't be happy with a gloomy, windowless cathedral. It's possible to strengthen this cathedral without removing the glass.

Try again
Try again!

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