D112221121133131333132322112331323331311221123223313133313231333132212111   >>    D11222112113313133313232211233132333131122112322331313331323133313221211   <<    D112221121133131333132322112331323331311221123223313133313231333132212113   >>      D112221121133131333132322112331323331311221123223313133313231333132212112   >>