C21231322221311331311211312111133132313223313331333112113313223313221121   >>    C2123132222131133131121131211113313231322331333133311211331322331322112   <<    C21231322221311331311211312111133132313223313331333112113313223313221123   >>      C21231322221311331311211312111133132313223313331333112113313223313221122   >>