C11112331312111112111133133313331333132323213331333131133232223211   >>    C1111233131211111211113313331333133313232321333133313113323222321   <<    C11112331312111112111133133313331333132323213331333131133232223213   >>      C11112331312111112111133133313331333132323213331333131133232223212   >>