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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class kie {
    public static void main(String[] args) {
        try {
            BufferedReader br =
                    new BufferedReader(new InputStreamReader(System.in));

            String first = br.readLine();
            String second = br.readLine();
            String[] numbers = second.split(" ");
            Integer[] nums = map(numbers);
            solve(nums);
        } catch (IOException io) {
            io.printStackTrace();
        }
    }

    private static void solve(Integer[] nums) {
        long sum = 0;
        for (int i = 0; i < nums.length; i++) {
            sum += nums[i];
        }
        if(sum%2==0) System.out.println(sum);
        Arrays.sort(nums);
        for(int i=0;i<nums.length;i++){
            if(nums[i]%2!=0)
            {
                sum-=nums[i];
                if(sum!=0) System.out.println(sum);
                else System.out.println("NIESTETY");
                return;
            }
        }
    }

    private static Integer[] map(String[] numbers) {

        Integer[] nums = new Integer[numbers.length];
        for (int i = 0; i < numbers.length; i++) {
            nums[i] = Integer.parseInt(numbers[i]);
        }
        return nums;
    }
}