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/*
 * main.cpp
 *
 *  Created on: Sep 29, 2015
 *      Author: jakub
 */

#include <iostream>
#include <cstdlib>
#include <climits>

using namespace std;

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

	int n;
	uint c = 0, s = 0, m = UINT32_MAX, x;

	cin >> n;
	while(n--) {
		cin >> x;
		s += x;
		c ^= x;
		if(x % 2 == 1)
			m = min(m, x);
	}

	if(c % 2 == 1)
		s -= m;

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

	return EXIT_SUCCESS;
}