Octans is one of the constellations in the southern hemisphere.

He is passionate about researching pure mathematics.

Let's try to arrange the prefectures of Japan in alphabetical order.

Herpes simplex virus is a virus that mainly infects the lips and genitals.

My friend is suffering from herpes simplex.

Japan's net national product is an important indicator of the health of the economy.

Jun has his special talent.

Shun shopped too much and ran out of money.

The nodes of this tree are distinctive, aren't they?

Takashi is a boy with excellent grades.