C11112331312111112111133133313331333133313232233132313331333133313231121   >>    C1111233131211111211113313331333133313331323223313231333133313331323112   <<    C11112331312111112111133133313331333133313232233132313331333133313231123   >>      C11112331312111112111133133313331333133313232233132313331333133313231122   >>