#767 SumaPare2

#include<iostream>
using namespace std;
int main ()
{
    int matrice[100][100],n,m,S=0;
    cin>>n>>m;
    for (int i=0; i<=n-1; i++)
        for (int j=0; j<=m-1; j++)
        {
            cin>>matrice[i][j];
            if (matrice[i][j]%2==0) S=S+matrice[i][j];
        }
    cout<<S;
    return 0;
}