function processData(input) {
    var lines = input.split('\n');
    
    var square = lines.map(function(line) { return line.split(' '); });
    
    var msquares = [
        [[8, 1, 6], [3, 5, 7], [4, 9, 2]],
        [[6, 1, 8], [7, 5, 3], [2, 9, 4]],
        [[4, 3, 8], [9, 5, 1], [2, 7, 6]],
        [[2, 7, 6], [9, 5, 1], [4, 3, 8]],
        [[2, 9, 4], [7, 5, 3], [6, 1, 8]],
        [[4, 9, 2], [3, 5, 7], [8, 1, 6]],
        [[6, 7, 2], [1, 5, 9], [8, 3, 4]],
        [[8, 3, 4], [1, 5, 9], [6, 7, 2]]
    ];
    
    var distances = msquares.map(function(msquare) { return findDistance(square, msquare); });
    
    process.stdout.write(Math.min.apply(null, distances));
    
} 

function findDistance(square1,  square2) {
    var distance = 0;
    
    for (var i = 0; i < 3; i++) {
        for (var j = 0; j < 3; j++) {
            
            distance += Math.abs(square1[i][j] - square2[i][j]);
        }
    }
    
    return distance;
}

process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
   processData(_input);
});