C21231322221311331311211312111133132313223313331323221223323221   >>    C2123132222131133131121131211113313231322331333132322122332322   <<    C21231322221311331311211312111133132313223313331323221223323223   >>      C21231322221311331311211312111133132313223313331323221223323222   >>