He was unconsciously following the woman.

The trailing edge of this airplane has a very unique shape.

He suffered a minor contusion on his occiput.

He placed the honorific after his name.

This word is used as a postposition.

He used his alphanumeric skills to create a computer program.

Suro is my best friend.

Saburo is my best friend.

Kazumasa is my best friend.

A composite number, unlike a prime number, is represented by the product of two or more natural numbers.