This building has a four-step staircase.

I climbed up the five-step staircase.

He is a Go player with a dan rank.

The gutter of this book is too wide, making it hard to read.

His acting has gone up a stage and grade.

This music is flowing with a pleasant ⠐⠫ along with a beautiful melody.

Natural language understanding is an important field of artificial intelligence.

I'm sorry, but I don't speak Japanese.

I am studying for the Japanese Language Proficiency Test next year.

My younger sister is twenty-two years old.