C11112331312111112111133133313331333133313331312111111331333133313232212322121   >>    C1111233131211111211113313331333133313331333131211111133133313331323221232212   <<    C11112331312111112111133133313331333133313331312111111331333133313232212322123   >>      C11112331312111112111133133313331333133313331312111111331333133313232212322122   >>