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WELL A DUCK WALKS UP TO A LEMONADE STAND AND HE SAYS TO THE MAN RUNNIN GHE STAND, HEY, GOT ANY GRAPES
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There aren't that many grammatical errors. The joke is still readable and understandable, and funny. A little over use of the comma and a little underuse of the full stop, but other than that there is nothing wrong with the post. Don't try to be clever, when you're not, Mr Grammar nazi. Indeed, kudos for the joke!