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#include <algorithm>
#include <vector>
#include <iostream>

using namespace std;

int main()
{
    unsigned int i,n,a,pop=0;
    unsigned long suma=0;

    cin>>n;

    for (i=0;i<n;i++)
    {
        cin>>a;
        if ((a&1)!=1)
            suma+=a;
        else
        {
            if (pop!=0)
            {
                suma=suma+pop+a;
                pop=0;
            }
            else
            {
                pop=a;
            }
        }

    }
    if (suma==0)
        cout<<"NIESTETY";
    else
        cout<<suma<<endl;

    return 0;
}