C21231322221311331311211312111133132313223313331322331311331333132322121   >>    C2123132222131133131121131211113313231322331333132233131133133313232212   <<    C21231322221311331311211312111133132313223313331322331311331333132322123   >>      C21231322221311331311211312111133132313223313331322331311331333132322122   >>