C21231322221311331311211312111133132313223313331322121111132213221   >>    C2123132222131133131121131211113313231322331333132212111113221322   <<    C21231322221311331311211312111133132313223313331322121111132213223   >>      C21231322221311331311211312111133132313223313331322121111132213222   >>