C1311213331333132332133313331333133313121111331333133313233231231   >>    C131121333133313233213331333133313331312111133133313331323323123   <<    C1311213331333132332133313331333133313121111331333133313233231233   >>      C1311213331333132332133313331333133313121111331333133313233231232   >>