C1111233131211111211113313331333133313232313331333133313331312112113122321   >>    C111123313121111121111331333133313331323231333133313331333131211211312232   <<    C1111233131211111211113313331333133313232313331333133313331312112113122323   >>      C1111233131211111211113313331333133313232313331333133313331312112113122322   >>