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#include <iostream>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);

    int result = 0, n;
    cin >> n;

    int prevOdd = 0;
    while (n --> 0)
    {
        int x;
        cin >> x;

        if (x % 2 == 0)
            result += x;
        else
        {
            if (prevOdd)
            {
                result += prevOdd + x;
                prevOdd = 0;
            }
            else
            {
                prevOdd = x;
            }
        }
    }

    if (result)
        cout << result << endl;
    else
        cout << "NIESTETY" << endl;
}