C21231322221311331311211312111133132313223313331323221232323221   >>    C2123132222131133131121131211113313231322331333132322123232322   <<    C21231322221311331311211312111133132313223313331323221232323223   >>      C21231322221311331311211312111133132313223313331323221232323222   >>