#include <iostream>
#include <algorithm>
#include <deque>
#include <iterator>
#include <string>
#include <fstream>
using namespace std;

class Book
{
protected:
    deque<string> m_Book;
public:
    Book(char* filename)
    {
        string a;
        ifstream file(filename,ios::in);
        while(!file.eof())
        {
            file>>a;
            m_Book.push_back(a);
        }
    }
    void print()
    {
        string c;
        for(int i=0;i<m_Book.size();i++)
        {
            c=m_Book[i];
            cout<<c<<" ";
        }

    }
    string& strToLower(string& s)
    {
        transform(s.begin(),s.end(),s.begin(),::tolower);
        return s;
    }
    void ToLower()
    {
        transform(m_Book.begin(),m_Book.end(),m_Book.begin(),strToLower);
    }
};
int main()
{
    Book b("book.txt");
    b.print();

}