C21231322221311331311211312111133132313223313331322133313221233121   >>    C2123132222131133131121131211113313231322331333132213331322123312   <<    C21231322221311331311211312111133132313223313331322133313221233123   >>      C21231322221311331311211312111133132313223313331322133313221233122   >>