C21231322221311331311211312111133132313223313331322331311331333131321323312121   >>    C2123132222131133131121131211113313231322331333132233131133133313132132331212   <<    C21231322221311331311211312111133132313223313331322331311331333131321323312123   >>      C21231322221311331311211312111133132313223313331322331311331333131321323312122   >>