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#include<iostream>

#define max 1000

using namespace std;

void clear(int* tab){
	for (int i = 0; i < max; ++i){
		tab[i] = 0;
	}
}

int main(){

	int portfel[max], n, bucks;
	long long sum = 0;
	cin >> n;

	clear(portfel);

	for (int i = 0; i < n; ++i){
		cin >> bucks;
		sum += bucks;
		portfel[bucks]++;
	}

	if (n == 1 && sum % 2 == 1){
		cout << "NIESTETY";
	}
	else{
		if (sum % 2 != 0){
			for (int i = 0; i < max; i += 2){
				if (portfel[i] != 0){
					sum -= (i+1);
					break;
				}
			}
		}
		cout << sum << endl;
	}
	
	return 0;
}