Combinatorics is a branch of mathematics dealing with issues of order and choice.

Discrete mathematics is an important field that forms the basis of computer science.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

My university is in Tokyo.

My high school has very strict rules.

My younger brother is learning cooking at a vocational school.

My sister is attending a boarding school.