C2221232323213331311331333133313231333132313221323131212121222221   >>    C222123232321333131133133313331323133313231322132313121212122222   <<    C2221232323213331311331333133313231333132313221323131212121222223   >>      C2221232323213331311331333133313231333132313221323131212121222222   >>