C1111233131211111211113313331333133313331333133313331311331322212121   >>    C111123313121111121111331333133313331333133313331333131133132221212   <<    C1111233131211111211113313331333133313331333133313331311331322212123   >>      C1111233131211111211113313331333133313331333133313331311331322212122   >>