C11112331312111112111133133313331311331323212331333131133131322121   >>    C1111233131211111211113313331333131133132321233133313113313132212   <<    C11112331312111112111133133313331311331323212331333131133131322123   >>      C11112331312111112111133133313331311331323212331333131133131322122   >>