var allMagic = [
[8, 1, 6, 3, 5, 7, 4, 9, 2],
[4, 3, 8, 9, 5, 1, 2, 7, 6],
[2, 9, 4, 7, 5, 3, 6, 1, 8],
[6, 7, 2, 1, 5, 9, 8, 3, 4],
[6, 1, 8, 7, 5, 3, 2, 9, 4],
[8, 3, 4, 1, 5, 9, 6, 7, 2],
[4, 9, 2, 3, 5, 7, 8, 1, 6],
[2, 7, 6, 9, 5, 1, 4, 3, 8],
];
    
function calculateCost(sq1, sq2) {
    var sum = 0;
    
    for (var i = 0; i<9; ++i){
        sum += Math.abs(sq1[i] - sq2[i])
    }
    
    return sum;
}

function processData(input) {
    //Enter your code here
    
    var sq = input.split(/\s+/g);
    
    var minCost = 100000;
    
    for (var i = 0; i<8; ++i){
        var cost = calculateCost(sq, allMagic[i]);
        if (cost < minCost) {
            minCost = cost;
        }
    }
    
    process.stdout.write(minCost);
} 

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

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