C11112331312111112111133132313331333133313232213331311331313311211   >>    C1111233131211111211113313231333133313331323221333131133131331121   <<    C11112331312111112111133132313331333133313232213331311331313311213   >>      C11112331312111112111133132313331333133313232213331311331313311212   >>