#include <fstream>
#include <iostream>
#define N 105
using namespace std;
ifstream fin(".in");
ofstream fout(".out");
///767
int a[N][N], n, m ;///declarearea unei matrice
int main()
{
    int i,j;

    ///citirea
    cin>>n>>m; /// n-nr de linii , m- nr de coloane
    for(i=1;i<=n;i++)
        for(j=1;j<=m;j++)
          cin>>a[i][j];
    ///prelucrare
    long long s=0;
    for(i=1;i<=n;++i)
        for(j=1;j<=m;++j)
          if(a[i][j]%2==0)
           s+=a[i][j];
    ///afisare
    cout<<s;
    return 0;
}