D21221323131123313112211231333132322331333132231333131232223321   >>    D2122132313112331311221123133313232233133313223133313123222332   <<    D21221323131123313112211231333132322331333132231333131232223323   >>      D21221323131123313112211231333132322331333132231333131232223322   >>