C11112331312111112111133133313331333133313123313331323233231111   >>    C1111233131211111211113313331333133313331312331333132323323111   <<    C11112331312111112111133133313331333133313123313331323233231113   >>      C11112331312111112111133133313331333133313123313331323233231112   >>