string typedString, actualString, document1 = "A.txt", document2 = "Dictionary.txt";
ifstream observeDoc, actualDoc;

observeDoc.open(document1);
actualDoc.open(document2);

while (observeDoc.is_open())
{
    while (true)
    {
        observeDoc >> typedString;
        if (observeDoc.eof()) break;
        cout << typedString << endl;

        while (true)
        {
            actualDoc >> actualString;
            if (actualDoc.eof())
            {
                actualDoc.open(document1);
                break;
            }
            cout << 't' << actualString << endl;
        }
    }
    if (observeDoc.eof()) break;
}

observeDoc.close();
actualDoc.close();