C21231322221311331311211312111133132313223313331322333133311311   >>    C2123132222131133131121131211113313231322331333132233313331131   <<    C21231322221311331311211312111133132313223313331322333133311313   >>      C21231322221311331311211312111133132313223313331322333133311312   >>