Add another line or so ... copy the line before you to continue the joke.
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Good News: Bertie Bots has a new flavour.
Bad News: It was suggested by Looney Luna Lovegood
Good News: It doesn't include Crumple Horned Snorkraks
Bad News: Hagrid is cooking it
Good News: Professor Sprout worked out it is great against slugs in her garden
Bad News: Slughorn tested it in the Potions classroom and that part of the castle needs to be re-built now
Good News: ... (your turn