odd

That's odd...

You want to take a list of numbers and find the sum of all of the even numbers in the list. Ignore any odd numbers.

Task

Find the sum of all even integers in a list of numbers.

Input Format

The first input denotes the length of the list (N). The next N lines contain the list elements as integers.

Output Format

An integer that represents the sum of only the even numbers in the list.

Sample Input

9
1
2
3
4
5
6
7
8
9

Sample Output

20

Explanation

If you add together 2, 4, 6, and 8 from the list, you get a sum of 20