Please tell me the way to solve this problem.

We are considering introducing a new voting system.

The police used a water cannon against the demonstrators.

Learning a new input method is difficult.

Special judicial police officers are working hard every day to protect the law in Japan.

Mizu is my best friend.

Jin is the ninth symbol of the Heavenly Stems.

She is respected as the queen's wife.

It's difficult to guess his feelings.

His bright smile lit up the room.