C2221232323213331311331333133313231333132313331333121313232212222221   >>    C222123232321333131133133313331323133313231333133312131323221222222   <<    C2221232323213331311331333133313231333132313331333121313232212222223   >>      C2221232323213331311331333133313231333132313331333121313232212222222   >>