in this world scientists forced children To stand in a lines d let a mechanical arm choose you and all which will stick out of your arm or back and your waist and when you get choose by one you forced to sign a contract and the scientists will connect that arm either to your waist back or arm sometimes neck and your next to get picked by a mechanical arm and the arms are all alive they can speak they have there own mind and the strongest mechanical arms to get picked by is a insect like mechanical arm