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#include <stdio.h>

int main()
{
	int n;
	int ai;
	int cash[1001] = { 0 };

	scanf("%d", &n);
	for (int i = 0; i < n; ++i)
	{
		scanf("%d", &ai);
		++cash[ai];
	}

	int lastOdd = 0;
	unsigned int total = 0;
	for (int i = 1000; i > 0; --i)
	{
		while (cash[i] > 0)
		{
			if (i % 2 == 1)
			{
				if (lastOdd != 0)
				{
					total += i + lastOdd;
					lastOdd = 0;
				}
				else
				{
					lastOdd = i;
				}
			}
			else
			{
				total += i;
			}

			--cash[i];
		}
	}

	if (total > 0)
		printf("%u", total);
	else
		printf("NIESTETY");
	return 0;
}