#include<stdio.h>
int main(void)
{
    int arr[3][3],z,mini=0;
    int sarr[9],add[8];
    int i,j,k=0,sum=0;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            scanf("%d ",&arr[i][j]);
        }
    }
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            sarr[k] = arr[i][j];
            k++;
        }
    }
    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 (i=0;i<8;i++)
    {
        k=0;
        for(j=0;j<9;j++)
        {
              matrix[i][j] = matrix[i][j]-sarr[k];
              if(matrix[i][j] <0)
              {
                 matrix[i][j] = -1*matrix[i][j];
              }
              k++;
        }
    }
    for (i = 0; i <8;++i)
    {
        sum=0;
        for (j = 0; j <9;++j)
        {
            sum = sum + matrix[i][j];
        }
       // printf("Sum of the %d row is = %d\n", i, sum);

        add[i] = sum;
    }
     for(j=0;j<8;j++)
     {
         if(add[j]<add[mini])
         {
             mini=j;
         }
     }
     z=add[mini];
     //inp[mini]=99999;
    printf("%d ",z);
    return 0;
}