C21231322221311331311211312111133132313223313331322331311331333133313211221   >>    C2123132222131133131121131211113313231322331333132233131133133313331321122   <<    C21231322221311331311211312111133132313223313331322331311331333133313211223   >>      C21231322221311331311211312111133132313223313331322331311331333133313211222   >>