public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int a[][] = new int[6][6];

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

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

a[i][j] = sc.nextInt();

}

}

int max = a[0][0] + a[0][1] + a[1][1] + a[0][2] + a[2][0] + a[2][1] + a[2][2];

int hourglass;

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

hourglass = a[i][j] + a[i][j + 1] + a[i][j + 2] + a[i + 1][j + 1] + a[i + 2][j] + a[i + 2][j + 1]

+ a[i + 2][j + 2];

if (hourglass > max)

max = hourglass;

}

}

System.out.println(max);

}

}