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 world My 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?