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

int main(void)
{
    int sarr[9];
    int k=0;
    int a[3][3];
	int total = 0;
	int cost = INT_MAX;
	int temp = 0;
    for(int a_i = 0; a_i < 3; a_i++){
       for(int a_j = 0; a_j < 3; a_j++){
          scanf("%d",&a[a_i][a_j]);
		  total += a[a_i][a_j];
       }
    }
	//printf("Total of matrix: %d\n",total);
	//flatten array
    for(int i=0;i<3;i++)
    {
        for(int j=0;j<3;j++)
        {
            sarr[k] = a[i][j];
            k++;
        }
    }
	//possible 3x3 magic squares only eight
    int matrix[8][9]={{4,9,2,3,5,7,8,1,6},{2,7,6,9,5,1,4,3,8},{6,1,8,7,5,3,2,9,4},{8,3,4,1,5,9,6,7,2},{2,9,4,7,5,3,6,1,8},{6,7,2,1,5,9,8,3,4},{8,1,6,3,5,7,4,9,2},{4,3,8,9,5,1,2,7,6}};
    for (int i=0;i<8;i++)
    {
        temp = 0;
        for(int j=0;j<9;j++)
        {
            temp+=abs(sarr[j]-matrix[i][j]);  
        }
		//printf("Temp of magic square matrix: %d\n",temp);
		if(temp < cost)
			cost = temp;
		//printf("Cost: %d\n",cost);
    }
  
    printf("%d ",cost);
    return 0;
}