D21221323131123313112211231333132322331333132231333131133232311   >>    D2122132313112331311221123133313232233133313223133313113323231   <<    D21221323131123313112211231333132322331333132231333131133232313   >>      D21221323131123313112211231333132322331333132231333131133232312   >>