C1111233131211111211113313331333133313331333133311221121111331313231   >>    C111123313121111121111331333133313331333133313331122112111133131323   <<    C1111233131211111211113313331333133313331333133311221121111331313233   >>      C1111233131211111211113313331333133313331333133311221121111331313232   >>