C21231322221311331311211312111133132313223313331323223311213121   >>    C2123132222131133131121131211113313231322331333132322331121312   <<    C21231322221311331311211312111133132313223313331323223311213123   >>      C21231322221311331311211312111133132313223313331323223311213122   >>