There is mango tree. On a field. The mango tree has ripe big mango. A big ferocious dog has been tied under the mango tree with a long rope. A man who is very hungry wants to eat mango. It is impossible to throw anything to the dog or to mango tree. How can the man go into mango tree and get mango to eat? Answer: The man should run around the tree. When the man run around the tree, the dog chases the man by going around the tree. Finally, the dog ties himself to the tree. Then, the man climbs to the mango tree and he gets mango.