vector <string> Mysplit(string str)
{
    vector <string> words;
    int L=str.size();
    if(str[L-1]!=' '){ str=str+' ';}
    int p=str.find(" ");
    while (p!=-1)
    {
       string  slovo=str.substr(0,p);
       words.push_back(slovo);
       str.erase(0,p+1);
       p=str.find(" ");
    }
    return words;
}