D112221121133131333132322112331323331311221123223313133313231333132322211231   >>    D11222112113313133313232211233132333131122112322331313331323133313232221123   <<    D112221121133131333132322112331323331311221123223313133313231333132322211233   >>      D112221121133131333132322112331323331311221123223313133313231333132322211232   >>