D112211231223323131232313232233132322331333132323132313231323221211   >>    D11221123122332313123231323223313232233133313232313231323132322121   <<    D112211231223323131232313232233132322331333132323132313231323221213   >>      D112211231223323131232313232233132322331333132323132313231323221212   >>