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#include <iostream>
#include <algorithm>

using namespace std;

int m[7][7];

int sumHourglass(int l, int c){

    int soma = 0;
    soma = m[l-1][c-1] + m[l-1][c] + m[l-1][c+1] + m[l][c] + m[l+1][c-1] + m[l+1][c] + m[l+1][c+1];

    return soma;
}

int main(){

    for(int i = 0; i < 6; i++){
        for(int j = 0; j < 6; j++){

            cin >> m[i][j];

        }
    }

    int ans = 0;

    for(int i = 0; i < 6; i++){
        for(int j = 0; j < 6; j++){

            if(i != 0 && j !=0 && i != 5 && j != 5){
                int aux = sumHourglass(i, j);
                //cout << "aux " << aux << endl;
                ans = max(ans, aux);
                //cout << "ans " << ans << endl;
            }

        }
    }

    cout << ans << endl;

    return 0;
}