C1311213331333132332133313331333133313121111331333133313331333132313233233121   >>    C131121333133313233213331333133313331312111133133313331333133313231323323312   <<    C1311213331333132332133313331333133313121111331333133313331333132313233233123   >>      C1311213331333132332133313331333133313121111331333133313331333132313233233122   >>