C11112331312111112111133133313331333132323133313331311212111133133312112121   >>    C1111233131211111211113313331333133313232313331333131121211113313331211212   <<    C11112331312111112111133133313331333132323133313331311212111133133312112123   >>      C11112331312111112111133133313331333132323133313331311212111133133312112122   >>