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#include <stdio.h>

#define NONE -1

int main(void) {
	int count;
	scanf("%d", &count);
	int i = 0, max_sum = 0, for_later = NONE;
	while(count--) {
		int banknote;
		scanf("%d", &banknote);
		if(banknote % 2 == 0) {
			max_sum += banknote;
		} else {
			if(for_later == NONE) {
				for_later = banknote;
			} else {
				max_sum += for_later + banknote;
				for_later = NONE;
			}
		}
	}
	
	if(max_sum == 0) {
		puts("NIESTETY");
	} else {
		printf("%d", max_sum);
	}
	
	return 0;
}