var sq1 = [8,1,6,3,5,7,4,9,2];
var sq2 = [6,1,8,7,5,3,2,9,4];
var sq3 = [4,3,8,9,5,1,2,7,6];
var sq4 = [2,7,6,9,5,1,4,3,8];
var sq5 = [2,9,4,7,5,3,6,1,8];
var sq6 = [4,9,2,3,5,7,8,1,6];
var sq7 = [6,7,2,1,5,9,8,3,4];
var sq8 = [8,3,4,1,5,9,6,7,2];

function processData(input) {
    var cost = 0;
    //console.log(input);
    input = input.split(/\s+/).map(Number);
    var sqs = [sq1,sq2,sq3,sq4,sq5,sq6,sq7,sq8];
    var costs = [0,0,0,0,0,0,0,0];
    for (var i = 0; i < 8; i++) {
        for (var j = 0; j < 9; j++) {
            costs[i] += Math.abs(sqs[i][j] - input[j]);
        }
    }
    console.log(Math.min.apply(Math, costs));
} 

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

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