In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Ex Input:
Fact: an animal requires stamina to succeed at physical activities.

Ex Output:
animal bear.


Ex Input:
Fact: a plant requires photosynthesis to grow.

Ex Output:
bamboo plant.


Ex Input:
Fact: All cells share some of the same structures and basic functions.

Ex Output:

basic functions simple process.