D112221121133131333132322112331323331311221123223313133313231323132311321111   >>    D11222112113313133313232211233132333131122112322331313331323132313231132111   <<    D112221121133131333132322112331323331311221123223313133313231323132311321113   >>      D112221121133131333132322112331323331311221123223313133313231323132311321112   >>