C2221232323213331311331333133313231333132313331333121313232313122122121221   >>    C222123232321333131133133313331323133313231333133312131323231312212212122   <<    C2221232323213331311331333133313231333132313331333121313232313122122121223   >>      C2221232323213331311331333133313231333132313331333121313232313122122121222   >>