#include <string>

using namespace std;

string ifAuthor(const string& temp, int& index , const int &iStr)
{
    string author = "";

    // проверка наличия одного(!) пробела
    unsigned int nOfSymbols = 0;
    for (unsigned int j = 0; temp[j] != '|'; ++j)
    {
        if (temp[j] == ' ')
            ++nOfSymbols;
        if (nOfSymbols > 1)
        {
            throw iStr;
        }
    }
    if (nOfSymbols != 1)
    {
        throw iStr;
    }
    // проверка фамилии и инициалов
    if (temp[index] >= 'А' && temp[index] <= 'Я' || temp[index] == 'Ё')
    {
        author += temp[index];
        ++index;
        for (; temp[index] != ' '; ++index)
        {
            if (temp[index] >= 'а' && temp[index] <= 'я' || temp[index] == 'ё')
                author += temp[index];
            else
            {
                throw iStr;
            }
        }
        author += ' ';
        ++index;
        if (temp[index + 4] != '|')
        {
            throw iStr;
        }
        if ((temp[index] >= 'А' && temp[index] <= 'Я' || temp[index] == 'Ё') &&
            temp[index + 1] == '.' &&
            (temp[index + 2] >= 'А' && temp[index + 2] <= 'Я' || temp[index + 2] == 'Ё') &&
            temp[index + 3] == '.')
        {
            for (; temp[index] != '|'; index++)
                author += temp[index];
        }
        else
        {
            throw iStr;
        }
    }
    else
    {
        throw iStr;
    }
    ++index;

    return author;
}