C1111233131211111211113313331333133313232313331333133313331331121133133312321   >>    C111123313121111121111331333133313331323231333133313331333133112113313331232   <<    C1111233131211111211113313331333133313232313331333133313331331121133133312323   >>      C1111233131211111211113313331333133313232313331333133313331331121133133312322   >>