string getCondition(string sentence)
{
    while (sentence[1] = ' '){
        sentence.erase(1, 1);
        while ((pos('  ', sentence)) > 0) {
            delete(sentence, pos('  ', sentence), 1);
            while (sentence[length(sentence)]) = ' ' {
                delete(sentence, length(sentence), 1);
            }
        }
    }
    return sentence;
}