D21221323131123313112211231333132322133313133313232211233132333111   >>    D2122132313112331311221123133313232213331313331323221123313233311   <<    D21221323131123313112211231333132322133313133313232211233132333113   >>      D21221323131123313112211231333132322133313133313232211233132333112   >>