D21221323131123313112211231333132322133313133313133313232213132313221   >>    D2122132313112331311221123133313232213331313331313331323221313231322   <<    D21221323131123313112211231333132322133313133313133313232213132313223   >>      D21221323131123313112211231333132322133313133313133313232213132313222   >>