import java.io.*;
import java.util.*;

public class Solution {
    // Test to see if its solved - All rows sum to 15 along with diagonals
    public static boolean solved(int[][] test) {
        for(int i = 0; i < 3; i++) {
            if((test[i][0] + test[i][1] + test[i][2])!= 15) return false;
            if((test[0][i] + test[1][i] + test[2][i])!= 15) return false;
        }
        if((test[0][0] + test[1][1] + test[2][2]) != 15) return false;
        if((test[0][2] + test[1][1] + test[2][0]) != 15) return false;
        
        return true;
    }
    
    // Hard coded the solutions
    // Return minimum score of solution
    public static int minScore(int[][] square) {
        int score = 1000;
        int tempScore;
        // case 1
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-8);
        tempScore = tempScore + Math.abs(square[0][1]-1);
        tempScore = tempScore + Math.abs(square[0][2]-6);
        tempScore = tempScore + Math.abs(square[1][0]-3);
        tempScore = tempScore + Math.abs(square[1][2]-7);
        tempScore = tempScore + Math.abs(square[2][0]-4);
        tempScore = tempScore + Math.abs(square[2][1]-9);
        tempScore = tempScore + Math.abs(square[2][2]-2);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 2
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-4);
        tempScore = tempScore + Math.abs(square[0][1]-3);
        tempScore = tempScore + Math.abs(square[0][2]-8);
        tempScore = tempScore + Math.abs(square[1][0]-9);
        tempScore = tempScore + Math.abs(square[1][2]-1);
        tempScore = tempScore + Math.abs(square[2][0]-2);
        tempScore = tempScore + Math.abs(square[2][1]-7);
        tempScore = tempScore + Math.abs(square[2][2]-6);
        if(tempScore <= score) {
            score = tempScore;
        }        
        // case 3
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-2);
        tempScore = tempScore + Math.abs(square[0][1]-9);
        tempScore = tempScore + Math.abs(square[0][2]-4);
        tempScore = tempScore + Math.abs(square[1][0]-7);
        tempScore = tempScore + Math.abs(square[1][2]-3);
        tempScore = tempScore + Math.abs(square[2][0]-6);
        tempScore = tempScore + Math.abs(square[2][1]-1);
        tempScore = tempScore + Math.abs(square[2][2]-8);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 4
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-6);
        tempScore = tempScore + Math.abs(square[0][1]-7);
        tempScore = tempScore + Math.abs(square[0][2]-2);
        tempScore = tempScore + Math.abs(square[1][0]-1);
        tempScore = tempScore + Math.abs(square[1][2]-9);
        tempScore = tempScore + Math.abs(square[2][0]-8);
        tempScore = tempScore + Math.abs(square[2][1]-3);
        tempScore = tempScore + Math.abs(square[2][2]-4);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 5
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-6);
        tempScore = tempScore + Math.abs(square[0][1]-1);
        tempScore = tempScore + Math.abs(square[0][2]-8);
        tempScore = tempScore + Math.abs(square[1][0]-7);
        tempScore = tempScore + Math.abs(square[1][2]-3);
        tempScore = tempScore + Math.abs(square[2][0]-2);
        tempScore = tempScore + Math.abs(square[2][1]-9);
        tempScore = tempScore + Math.abs(square[2][2]-4);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 6
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-8);
        tempScore = tempScore + Math.abs(square[0][1]-3);
        tempScore = tempScore + Math.abs(square[0][2]-4);
        tempScore = tempScore + Math.abs(square[1][0]-1);
        tempScore = tempScore + Math.abs(square[1][2]-9);
        tempScore = tempScore + Math.abs(square[2][0]-6);
        tempScore = tempScore + Math.abs(square[2][1]-7);
        tempScore = tempScore + Math.abs(square[2][2]-2);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 7
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-4);
        tempScore = tempScore + Math.abs(square[0][1]-9);
        tempScore = tempScore + Math.abs(square[0][2]-2);
        tempScore = tempScore + Math.abs(square[1][0]-3);
        tempScore = tempScore + Math.abs(square[1][2]-7);
        tempScore = tempScore + Math.abs(square[2][0]-8);
        tempScore = tempScore + Math.abs(square[2][1]-1);
        tempScore = tempScore + Math.abs(square[2][2]-6);
        if(tempScore <= score) {
            score = tempScore;
        }
        // case 8
        tempScore = 0;
        tempScore = tempScore + Math.abs(square[0][0]-2);
        tempScore = tempScore + Math.abs(square[0][1]-7);
        tempScore = tempScore + Math.abs(square[0][2]-6);
        tempScore = tempScore + Math.abs(square[1][0]-9);
        tempScore = tempScore + Math.abs(square[1][2]-1);
        tempScore = tempScore + Math.abs(square[2][0]-4);
        tempScore = tempScore + Math.abs(square[2][1]-3);
        tempScore = tempScore + Math.abs(square[2][2]-8);
        if(tempScore <= score) {
            score = tempScore;
        }
        
        return score;
    }
    

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        // Read square
        Scanner s = new Scanner(System.in);
        int[][] square = new int[3][3];
        for(int i = 0; i < 3; i++) {
            for(int j = 0; j < 3; j++) {
                square[i][j] = s.nextInt();
            }
        }
        s.close();
        
        int score = 0;
        // Check if solved, if not check middle
        if(!solved(square)) {
            if(square[1][1] != 5) {
                score = score + Math.abs(square[1][1]-5);
                square[1][1]=5;
            }
        }
        if(!solved(square)) {
            score = score + minScore(square);
        }
        
        System.out.println(score);
        /*
        for(int i = 0; i < 3; i++) {
            for(int j = 0; j < 3; j++) {
                System.out.print(square[i][j] + " ");
            }
            System.out.println();
        }
        */
    }
}