C2221232323213331311331333133313231323133313231322213113213212121   >>    C222123232321333131133133313331323132313331323132221311321321212   <<    C2221232323213331311331333133313231323133313231322213113213212123   >>      C2221232323213331311331333133313231323133313231322213113213212122   >>