Jack has got a teddy bear and a guitar, but he hasn't got a ball and roller-skates.
John and Tony have got a ball and a guitar, but they haven't got a teddy bear and roller-skates.
Helen and Nancy have got a guitar and roller-skates, but they haven't got a teddy bear and a ball.
Steve has got a teddy bear and a guitar, but he hasn't got a ball and roller-skates.