C11112331312111112111133133313331333133313123313331333131211113313231322313231   >>    C1111233131211111211113313331333133313331312331333133313121111331323132231323   <<    C11112331312111112111133133313331333133313123313331333131211113313231322313233   >>      C11112331312111112111133133313331333133313123313331333131211113313231322313232   >>