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#include<bits/stdc++.h>

using namespace std;

int main(){
    int n,a,sum=0,mini=2000006;
    scanf("%d",&n);
    while(n--){
        scanf("%d",&a);
        sum+=a;
        if(a%2)
            mini=min(mini,a);
    }
    if(sum%2) sum-=mini;
    if(!(sum%2) && sum>0) printf("%d",sum);
    else printf("NIESTETY");
    return 0;
}