[(0,'hello'),(1,'world')]
[(0,'hello'),(1,'world')]
[(0,'hello'),(1,'world')]
[(0,'hello'),(1,'world')]
[(0,'0'),(0,'world')]
[(0,'1'),(1,'world')]
[(0,'2'),(2,'world')]
[(0,'3'),(3,'world')]
[(0,'4'),(4,'world')]
[(0,'5'),(5,'world')]
[(0,'6'),(6,'world')]
[(0,'7'),(7,'world')]
[(0,'8'),(8,'world')]
[(0,'9'),(9,'world')]
[(1,[]),(0,[]),(0,[])]
[(1,[]),(1,[]),(1,[])]
[(1,[]),(2,[]),(4,[])]
[(1,[]),(3,[]),(9,[])]
[(1,[]),(4,[]),(16,[])]
[(1,[]),(5,[]),(25,[])]
[(1,[]),(6,[]),(36,[])]
[(1,[]),(7,[]),(49,[])]
[(1,[]),(8,[]),(64,[])]
[(1,[]),(9,[]),(81,[])]