C21231322221311331311211312111133132313223313331333113313223312111   >>    C2123132222131133131121131211113313231322331333133311331322331211   <<    C21231322221311331311211312111133132313223313331333113313223312113   >>      C21231322221311331311211312111133132313223313331333113313223312112   >>