C11112331312111112111133133313331333133313112113313331311331333133313232113121   >>    C1111233131211111211113313331333133313331311211331333131133133313331323211312   <<    C11112331312111112111133133313331333133313112113313331311331333133313232113123   >>      C11112331312111112111133133313331333133313112113313331311331333133313232113122   >>