C1111233131211111211113313331333133313232313331333133313332111132213331312121   >>    C111123313121111121111331333133313331323231333133313331333211113221333131212   <<    C1111233131211111211113313331333133313232313331333133313332111132213331312123   >>      C1111233131211111211113313331333133313232313331333133313332111132213331312122   >>