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Storyteller: Long long ago there was a seller he took a spear and a shield to the market and began to sell them.”
Seller: Come on come on everyone! Come here and have a look I have the best spear and shield.
Costmer: well they are not bad.
Seller: No bad? They are the best. Have you seen my spear? It’s the best in the worldMy spear could stab through any shields.
Costmer 2: Oh really? What about your shield. Seller: Of course it’s the best too. It can stop any spears in the world.
Wise Fellow:Then…… what if your spear fights against your shield?
Seller: Sorry! I forget my own shield?