C11112331312111112111133133313331333133313123313331323221213233321   >>    C1111233131211111211113313331333133313331312331333132322121323332   <<    C11112331312111112111133133313331333133313123313331323221213233323   >>      C11112331312111112111133133313331333133313123313331323221213233322   >>