D112221121133131333132322112331323331311221123223313133313231333131313231211   >>    D11222112113313133313232211233132333131122112322331313331323133313131323121   <<    D112221121133131333132322112331323331311221123223313133313231333131313231213   >>      D112221121133131333132322112331323331311221123223313133313231333131313231212   >>