D112221121133131333132322112331323331311221123223313133313231323132322112111   >>    D11222112113313133313232211233132333131122112322331313331323132313232211211   <<    D112221121133131333132322112331323331311221123223313133313231323132322112113   >>      D112221121133131333132322112331323331311221123223313133313231323132322112112   >>