C11112331312111112111133133313331333133313331333133313311211111333131111   >>    C1111233131211111211113313331333133313331333133313331331121111133313111   <<    C11112331312111112111133133313331333133313331333133313311211111333131113   >>      C11112331312111112111133133313331333133313331333133313311211111333131112   >>