public static void main(String[] args) throws IOException {

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

List<List<Integer>> arr = new ArrayList<>();

// Reading input into the 2D array

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

String[] arrRowTempItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

List<Integer> arrRowItems = new ArrayList<>();

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

int arrItem = Integer.parseInt(arrRowTempItems[j]);

arrRowItems.add(arrItem);

}

arr.add(arrRowItems);

}

bufferedReader.close();

int maxSum = Integer.MIN_VALUE;

// Loop through the array and calculate the hourglass sum for each possible hourglass

for (int i = 1; i < 5; i++) { // i is the center row of the hourglass

for (int j = 1; j < 5; j++) { // j is the center column of the hourglass

// Calculate the sum of the hourglass

int sum = arr.get(i-1).get(j-1) + arr.get(i-1).get(j) + arr.get(i-1).get(j+1) // top row

+ arr.get(i).get(j) // middle row (just the middle element)

+ arr.get(i+1).get(j-1) + arr.get(i+1).get(j) + arr.get(i+1).get(j+1); // bottom row

// Update maxSum if the current hourglass sum is greater

maxSum = Math.max(maxSum, sum);

}

}

// Print the largest hourglass sum

System.out.println(maxSum);

}