D112221121133131333132322112331323331311221123223313133313231333131232313232111   >>    D11222112113313133313232211233132333131122112322331313331323133313123231323211   <<    D112221121133131333132322112331323331311221123223313133313231333131232313232113   >>      D112221121133131333132322112331323331311221123223313133313231333131232313232112   >>