C11112331312111112111133133313331333133313223223313231311322121   >>    C1111233131211111211113313331333133313331322322331323131132212   <<    C11112331312111112111133133313331333133313223223313231311322123   >>      C11112331312111112111133133313331333133313223223313231311322122   >>