C1111233131211111211113313331333133313232313331333133313321131212121   >>    C111123313121111121111331333133313331323231333133313331332113121212   <<    C1111233131211111211113313331333133313232313331333133313321131212123   >>      C1111233131211111211113313331333133313232313331333133313321131212122   >>