C11112331312111112111133133313331333132323133313331322132212131   >>    C1111233131211111211113313331333133313232313331333132213221213   <<    C11112331312111112111133133313331333132323133313331322132212133   >>      C11112331312111112111133133313331333132323133313331322132212132   >>