#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int main()
{
    int finalsum=1000,i,A[10000],j,k,h,sum=0;
    for(i=0;i<9;i++)
    {
        scanf("%d",&A[i]);
    }
int square[8][9] = {
        {6, 1, 8, 7, 5, 3, 2, 9, 4},
        {8, 1, 6, 3, 5, 7, 4, 9, 2},
        {8, 3, 4, 1, 5, 9, 6, 7, 2},
        {6, 7, 2, 1, 5, 9, 8, 3, 4},
        {2, 7, 6, 9, 5, 1, 4, 3, 8},
        {4, 3, 8, 9, 5, 1, 2, 7, 6},
        {4, 9, 2, 3, 5, 7, 8, 1, 6},
        {2, 9, 4, 7, 5, 3, 6, 1, 8}
    };
for(j=0;j<8;j++)
    {
      sum=0;
      for(k=0;k<9;k++)
          {
          h=(square[j][k])-A[k];
          sum=sum+abs(h);
      }
 if(sum<finalsum)
     finalsum=sum;
}
printf("%d",finalsum);
}