C11112331312111112111133133313331333132323213331333131121133231323321221   >>    C1111233131211111211113313331333133313232321333133313112113323132332122   <<    C11112331312111112111133133313331333132323213331333131121133231323321223   >>      C11112331312111112111133133313331333132323213331333131121133231323321222   >>