C2221232323213331311331333133313231333132313221323131213133123211   >>    C222123232321333131133133313331323133313231322132313121313312321   <<    C2221232323213331311331333133313231333132313221323131213133123213   >>      C2221232323213331311331333133313231333132313221323131213133123212   >>