D21221323131123313112211231333132322133313133313232211233132322321   >>    D2122132313112331311221123133313232213331313331323221123313232232   <<    D21221323131123313112211231333132322133313133313232211233132322323   >>      D21221323131123313112211231333132322133313133313232211233132322322   >>