C11112331312111112111133133313331333132323133313331311212111133133313211   >>    C1111233131211111211113313331333133313232313331333131121211113313331321   <<    C11112331312111112111133133313331333132323133313331311212111133133313213   >>      C11112331312111112111133133313331333132323133313331311212111133133313212   >>