Once there was a very wise man working with a king in India. One day, one of the king's ring was stolen. Therefore, the king asked the wise man to find the thief. The wise man called everyone in the court to show up in front of him. The he said the ring had some magic. It could make the fingers on the thief's right hand longer than those on the left hand. After that the wise man could catch the thief and brought him to the king. How could he find the thief? The thief raised his hands to see if the right fingers were really longer than the left fingers.