C2221232323213331311331333133313331323132313331333112123122131223221221   >>    C222123232321333131133133313331333132313231333133311212312213122322122   <<    C2221232323213331311331333133313331323132313331333112123122131223221223   >>      C2221232323213331311331333133313331323132313331333112123122131223221222   >>