C2221232323213331311331333133313231333132313221323131211133223121   >>    C222123232321333131133133313331323133313231322132313121113322312   <<    C2221232323213331311331333133313231333132313221323131211133223123   >>      C2221232323213331311331333133313231333132313221323131211133223122   >>