C2221232323213331311331333133313231333132313221323131212123212121   >>    C222123232321333131133133313331323133313231322132313121212321212   <<    C2221232323213331311331333133313231333132313221323131212123212123   >>      C2221232323213331311331333133313231333132313221323131212123212122   >>