C1311213331333132332133313331333133313121111331333133313211231231   >>    C131121333133313233213331333133313331312111133133313331321123123   <<    C1311213331333132332133313331333133313121111331333133313211231233   >>      C1311213331333132332133313331333133313121111331333133313211231232   >>