ostream outputting garbage

Hi, i have the following program to display the input received
separated into any word that has Uppercase letters and all lowercase
words.

For the following input "Upper lower" i get the following
output on the console

Upper
0002A634lower
0002A634

I was expecting just

Upper
lower

Why am i getting the print of some memory address presumably, code
below:

using std::string;
using std::vector;
using std::cin;
using std::cout;
using std::ostream;
using std::endl;

bool IsUpper(const string& s);
ostream& Write(ostream& out, vector<string>& v);
vector<string> GetUpper(vector<string>& v);

int _tmain()
{
    vector<string> vec;

    string s;

    while (cin >> s)
        vec.push_back(s);

    vector<string> Upper = GetUpper(vec);

    cout << Write(cout, Upper);
    cout << Write(cout , vec);

   return 0;

}

ostream& Write(ostream& out, vector<string>& v)
{
    for(vector<string>::size_type i =0; i!=v.size(); ++i)
    {
        out << v[i] << endl;
    }
    return out;
}

vector<string> GetUpper(vector<string>& v)
{
    vector<string> Upper;
    vector<string>::iterator iter = v.begin();
    while (iter != v.end())
    {
        if (IsUpper(*iter))
        {
            Upper.push_back(*iter);
            iter = v.erase(iter);
        }
        else
        {
            ++iter;
        }
    }
    return Upper;

}

bool IsUpper(const string& s)
{
    bool ret = false;
    typedef string::size_type string_size;
    string_size i = 0;

    while (i != s.size() && (ret==false))
    {
        if (isupper(s[i]))
            ret = true;
        ++i;
    }
    return ret;
}