'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the hourglassSum function below.
function hourglassSum(arr) {

    const n = arr.length;
    let max = 0;
    for (let i = 0; i < n - 2; i++) {
        const sn = arr[i].length;
        for (let j = 0; j < sn - 2; j++) {
            if (i + 2 < n && j + 2 < sn) {
                const sum = arr[i][j] + arr[i][j + 1] + arr[i][j + 2] + arr[i + 1][j + 1] + arr[i + 2][j] + arr[i + 2][j + 1] + arr[i + 2][j + 2];
                max = max <= sum || (max === 0 && i === 0) ? sum : max;
            }

        }

    }
    return max;
}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    let arr = Array(6);

    for (let i = 0; i < 6; i++) {
        arr[i] = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));
    }

    let result = hourglassSum(arr);

    ws.write(result + "\n");

    ws.end();
}