C11112331312111112111133133313331333133313331312111133133112111133132233131231   >>    C1111233131211111211113313331333133313331333131211113313311211113313223313123   <<    C11112331312111112111133133313331333133313331312111133133112111133132233131233   >>      C11112331312111112111133133313331333133313331312111133133112111133132233131232   >>