C11112331312111112111133133313331333133313223313331312111133133313233231121   >>    C1111233131211111211113313331333133313331322331333131211113313331323323112   <<    C11112331312111112111133133313331333133313223313331312111133133313233231123   >>      C11112331312111112111133133313331333133313223313331312111133133313233231122   >>