C21231322221311331311211312111133132313223313331322331311331333133313221232311   >>    C2123132222131133131121131211113313231322331333132233131133133313331322123231   <<    C21231322221311331311211312111133132313223313331322331311331333133313221232313   >>      C21231322221311331311211312111133132313223313331322331311331333133313221232312   >>