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.

My younger sister is eighteen years old.

He warned the young people, saying 'At thirty, one should not be careless, at forty, one should not be indecisive.'

He drew a hendecagon shape.

He was drawing a pentadecagon shape.

He was drawing a tridecagon shape.

He was drawing an icosagon shape.

He was drawing an enneadecagon shape.