C11112331312111112111133133313331333132323133313331311212111133133313232222131   >>    C1111233131211111211113313331333133313232313331333131121211113313331323222213   <<    C11112331312111112111133133313331333132323133313331311212111133133313232222133   >>      C11112331312111112111133133313331333132323133313331311212111133133313232222132   >>