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#include <iostream>

using namespace std;

int main(void)
{
    ios_base::sync_with_stdio(0);
    int sum = 0, moneyCount = 0;
    int temp = 0;
    cin >> moneyCount;

    if(moneyCount==1)
    {
        cout << "NIESTETY" << endl;
        return 0;
    }

    for(int x = 0;x<moneyCount;++x)
    {
        cin >> temp;
        sum += temp;
    }

    if( (sum%2) == 0 )
    {
        cout << sum << endl;
    }
    else
    {
        if( (sum-1) != 0 && (sum-1) != 1)
        {
            cout << sum-3 << endl;
        }
        else
        {
            cout << "NIESTETY" << endl;
        }
    }

    return 0;
}