C11112331312111112111133133313331333133112111113331311331333133313231322121   >>    C1111233131211111211113313331333133313311211111333131133133313331323132212   <<    C11112331312111112111133133313331333133112111113331311331333133313231322123   >>      C11112331312111112111133133313331333133112111113331311331333133313231322122   >>