// только стандартная кодировка
void WordsCounter( const std::string name_in, const std::string name_out )
{
    std::map<std::string, ull> words_map;
    ull max_count = std::numeric_limits<ull>::max();
    std::string word = "";
    std::string line;
    std::ifstream input_stream( name_in );
    try
    {
        for( line; std::getline( input_stream, line ); )
        {
            for( const auto& symb: line )
                if( std::isalpha( static_cast<unsigned char>( symb ) ) )
                    word.push_back( std::tolower( static_cast<unsigned char>( symb ) ) );
                else
                {
                    if( word.length() )
                    {
                        if( words_map.find( word ) != words_map.end() )
                            words_map[word] = words_map[word] == max_count ? -1 : words_map[word] + 1;
                        else
                            words_map[word] = 1;

                        word = "";
                    }
                }
        }
        input_stream.close();
    }
    catch( std::exception const& e )
    {
        std::cout << "Err in reading file " << e.what() << endl;
        input_stream.close();
    }

    std::vector< std::pair<std::string, ull> > res_word_list( words_map.begin(), words_map.end() );
    std::sort( res_word_list.begin(), res_word_list.end(),
    [](const pair<std::string, ull>  &p1, const pair<std::string, ull> &p2)
    {
        return p1.second > p2.second || p1.second == -1;
    });
    std::ofstream output_stream( name_out );
    try
    {
        for( const auto& word_info: res_word_list )
        {
                if( word_info.second == -1 )
                    output_stream << "Очень много";
                else
                    output_stream << word_info.second;
                output_stream << " "<< word_info.first;
                output_stream << std::endl;
        }
        output_stream.close();
    }
    catch( std::exception const& e )
    {
        std::cout << "Err in writing file " << e.what() << endl;
        output_stream.close();
    }
}