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#include <iostream>
using namespace std;
int tab[1000001];
int main(){
	int i,s=0;
	cin>>i;
	for(int b=0;b<i;b++)
	{cin>>tab[b];
	s=s+tab[b];}
	
	if(s%2==0)
	cout<<s;
	else cout<<"NIESTETY";
	
	
	
	return 0;
	
}