C2221232323213331311331333133313331323132313222212333211232322321   >>    C222123232321333131133133313331333132313231322221233321123232232   <<    C2221232323213331311331333133313331323132313222212333211232322323   >>      C2221232323213331311331333133313331323132313222212333211232322322   >>