A knight walked in the desert. It was a long journey. On the way he lost his horse, his helmet and his armour. All he had left was his sword. The knight was hungry and thirsty. Suddenly he saw a lake in the distance. He mustered all his remaining strength and went to the water.

And on the shore of the lake sat a three-headed dragon. The knight drew his sword and fought the monster as hard as he could. He fought for one day, a second day. Two of the dragon's heads were cut off. On the third day the dragon fell down without strength. The knight also fell on his side, unable to stand and hold his sword.

And then, out of the last of his strength, the dragon asked:
- Knight, what was it you wanted?
I wanted to drink some water.
- So why didn't you drinking the water and fighting me?