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#include <cstdio>
int n, x, mx, suma;

int main() 
{
	scanf("%d", &n);
	mx = 0;
	while(n--)
	{
		scanf("%d", &x);
		suma += x;
		if (x % 2 == 1 && x > mx){mx = x;}
	}
	
	if (suma % 2 == 0)
	{
		printf("%d\n", suma);
	}
	else
	{
		if (suma == mx){printf("NIESTETY\n");}else{printf("%d\n", suma - mx);}
	}

return 0;
}