#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <limits.h>

int is_magic(int matrix[3][3]) {
    int x1 = matrix[0][0] + matrix[0][1] + matrix[0][2];    
    int x2 = matrix[1][0] + matrix[1][1] + matrix[1][2];
    if (x1 != x2) return 0; 
    int x3 = matrix[2][0] + matrix[2][1] + matrix[2][2];       
    if (x2 != x3) return 0;
    int y1 = matrix[0][0] + matrix[0][1] + matrix[0][2];
    if (x3 != y1) return 0;    
    int y2 = matrix[1][0] + matrix[1][1] + matrix[1][2];
    if (y1 != y2) return 0;    
    int y3 = matrix[2][0] + matrix[2][1] + matrix[2][2];
    if (y2 != y3) return 0;    
    int d1 = matrix[0][0] + matrix[1][1] + matrix[2][2];
    if (y3 != d1) return 0;    
    int d2 = matrix[2][0] + matrix[1][1] + matrix[0][2];
    if (d1 != d2) return 0;
    if (d2 != 15) return 0;
    return 1;
}

int magic_squares[8][3][3] = 
{    
    {
        {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}
    }        
};

int calculate_cost(int a[3][3], int b[3][3]) {
    int cost = 0;
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cost += abs(a[i][j] - b[i][j]);
        }
    }
    return cost;
}
        
int main() {
    int matrix[3][3];
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            scanf("%d", (matrix[i] + j));
        }    
    }   
    int min_cost = INT_MAX;
    for (int i = 0; i < 8; i++) {
        int cost = calculate_cost(matrix, magic_squares[i]);
        if (cost < min_cost) {
            min_cost = cost;
        }
    }    
    printf("%d", min_cost);
    return 0;
}