C1311213331333132332133313331333133313331333133313112211231221131   >>    C131121333133313233213331333133313331333133313331311221123122113   <<    C1311213331333132332133313331333133313331333133313112211231221133   >>      C1311213331333132332133313331333133313331333133313112211231221132   >>