Son:Dad, the storm has gone. It's a fine day today.
　　Father:Yes. Let's go to the farm and count our animals.
　　Son:Ok, Dad. I think they are all very fine.
　　
　　On the farm...
　　Father:Count the cows. Are they all right?
　　Son: Yes. They are all here.
　　Father:Count the horses. Are they all right?
　　Son:Yes. They are all here.
　　Father:Good. Now go and count the pigs.
　　Son: Yes, Dad.
　　
　　Few minutes later...
　　Son:Dad, Dad!
　　Father:Yes?
　　 Son:Why?
　　 Son:I have counted nineteen pigs. They are all very fine. But the little pig is running away, and I can't count it!