#include<stdio.h>
int main()
         {
         int x[3][3],i,j,sum[8]={0,0,0,0,0,0,0,0},min;
         for(i=0;i<3;i++)
         {
             for(j=0;j<3;j++)
                scanf("%d",&x[i][j]);
         }
         int a1[3][3]={4,9,2,3,5,7,8,1,6},a2[3][3]={2,7,6,9,5,1,4,3,8},a3[3][3]={6,1,8,7,5,3,2,9,4},a4[3][3]={8,3,4,1,5,9,6,7,2},a5[3][3]={8,1,6,3,5,7,4,9,2};
int a6[3][3]={4,3,8,9,5,1,2,7,6},a7[3][3]={2,9,4,7,5,3,6,1,8},a8[3][3]={6,7,2,1,5,9,8,3,4};
for(i=0;i<3;i++)
{

    for(j=0;j<3;j++)
    {
        if(x[i][j]-a1[i][j]<0)
            sum[0]+=(a1[i][j]-x[i][j]);
            else
                sum[0]+=x[i][j]-a1[i][j];



           if(x[i][j]-a2[i][j]<0)
            sum[1]+=(a2[i][j]-x[i][j]);
            else
                sum[1]+=x[i][j]-a2[i][j];


            if(x[i][j]-a3[i][j]<0)
            sum[2]+=(a3[i][j]-x[i][j]);
            else
                sum[2]+=x[i][j]-a3[i][j];

          if(x[i][j]-a4[i][j]<0)
            sum[3]+=(a4[i][j]-x[i][j]);
            else
                sum[3]+=x[i][j]-a4[i][j];

          if(x[i][j]-a5[i][j]<0)
            sum[4]+=(a5[i][j]-x[i][j]);
            else
                sum[4]+=x[i][j]-a5[i][j];

          if(x[i][j]-a6[i][j]<0)
            sum[5]+=(a6[i][j]-x[i][j]);
            else
                sum[5]+=x[i][j]-a6[i][j];
          if(x[i][j]-a7[i][j]<0)
            sum[6]+=(a7[i][j]-x[i][j]);
            else

            sum[6]+=x[i][j]-a7[i][j];

 if(x[i][j]-a8[i][j]<0)
            sum[7]+=(a8[i][j]-x[i][j]);
            else
                sum[7]+=x[i][j]-a8[i][j];
    }
}min=sum[0];
for(i=1;i<8;i++)
{
   if(min>sum[i])
   min=sum[i];
}
printf("%d",min);
return 0;
         }