C1111233131211111211113313331333133313232313331333133313331311331121312121   >>    C111123313121111121111331333133313331323231333133313331333131133112131212   <<    C1111233131211111211113313331333133313232313331333133313331311331121312123   >>      C1111233131211111211113313331333133313232313331333133313331311331121312122   >>