public class Solution { public static void main(String[] args) throws IOException { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

    // 6x6 2D Array input using List of List
    List<List<Integer>> arr = new ArrayList<>();

    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();

    // Initialize maxSum to minimum possible integer value
    int maxSum = Integer.MIN_VALUE;

    // Loop through all possible hourglass starting positions
    for (int i = 0; i < 4; i++) {  // rows
        for (int j = 0; j < 4; j++) {  // columns

            // Calculate sum of current hourglass
            int currentSum = arr.get(i).get(j) + arr.get(i).get(j+1) + arr.get(i).get(j+2)
                           + arr.get(i+1).get(j+1)
                           + arr.get(i+2).get(j) + arr.get(i+2).get(j+1) + arr.get(i+2).get(j+2);

            // Update maxSum if needed
            if (currentSum > maxSum) {
                maxSum = currentSum;
            }
        }
    }

    // Output the result
    System.out.println(maxSum);
}

}