D23112331322331313231323331313132333131323331322331313311212121   >>    D2311233132233131323132333131313233313132333132233131331121212   <<    D23112331322331313231323331313132333131323331322331313311212123   >>      D23112331322331313231323331313132333131323331322331313311212122   >>