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#include<iostream>
#include<cmath>
#define ll long long
using namespace std;
int main ()
{
	ll a,b,c,n,suma=0;
	ll tab[1000100],pom[1010]={};
	cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>tab[i];
		pom[tab[i]]++;
		suma+=tab[i];
	}

	if(suma%2==0)cout<<suma;
	else
	{
		ll i=1;
		while(pom[i]==0&&i<1000)
		{
			i+=2;
		}
		//cout<<i;
		if(i<1000&&suma-i!=0)
		cout<<suma-i;
		else 
		cout<<"NIESTETY";
	}
	
	return 0;
}