My birthday is on the sixteenth.

My birthday is on the fifteenth.

My birthday is on the fourteenth.

My younger sister is seventeen years old.

We usually represent numbers using the decimal system.

Jumiko is my best friend.

My friend won the go tournament called Judan.

It is said that his fortune reaches a trillion billion yen.

There are twelve students in my class.

My younger sister is nineteen years old.