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#include <iostream>

using namespace std;

unsigned S=0;
unsigned il[1000];
unsigned n;
short a;

void prog()
{
	for (unsigned i = 0; i < 1000; i++)
	{
		il[i] = 0;
	}
	cin >> n;
	for (unsigned i = 0; i < n; i++)
	{
		cin >> a;
		il[a - 1]++;
		S += a;
	}
	if (S % 2 == 0)
	{
		cout << S;
		return;
	}
	else
	{
		unsigned i = 0;
		for (; i < 1000; i += 2)
		{
			if (il[i]>0)
			{
				S -= i + 1;
				if (S > 0)cout << S;
				else cout << "NIESTETY";
				return;
			}
		}
		cout << "NIESTETY";
	}
}

int main()
{
	prog();
	return 0;
}