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#include <cstdio>

using namespace std;

int main() {
	int smallest_odd = -1, sum = 0, n, tmp;
	
	scanf("%d\n", &n);
	
	for(int i=0; i<n; i++) {
		scanf("%d ", &tmp);
		if(((smallest_odd > 0 && smallest_odd > tmp) || smallest_odd < 0) && tmp % 2)
			smallest_odd = tmp;
		sum += tmp;
	}
	
	if(sum % 2 && smallest_odd > 0) sum -= smallest_odd; 

	if(sum > 0 && sum % 2 == 0) printf("%d\n", sum);
	else printf("NIESTETY\n");
	
	return 0;
}