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

int main() {

    int a[3][3],i,j;
    for(i=0;i<3;++i)
    {
        for(j=0;j<3;++j)
            scanf("%d",&a[i][j]);
    }
    int res[8];
    for(i=0;i<8;++i){res[i]=0;}
    int b1[3][3]=
    {
        {8,1,6},
        {3,5,7},
        {4,9,2}
    };       
    int b2[3][3]=
    {   {4,3,8},
        {9,5,1},
        {2,7,6}
    };
    int b3[3][3]=
    {    
        {2,9,4},
        {7,5,3},
        {6,1,8}
    };
    int b4[3][3]=
    {    
        {6,7,2},
        {1,5,9},
        {8,3,4},
    };
    int b5[3][3]=
    {    
        {6,1,8},
        {7,5,3},
        {2,9,4}
    };    
    int b6[5][5]=
    {   {8,3,4},
        {1,5,9},
        {6,7,2}
    };
    int b7[5][5]=
    {    
        {4,9,2},
        {3,5,7},
        {8,1,6}
    };    
    int b8[5][5]=
    {   {2,7,6},
        {9,5,1},
        {4,3,8}    
    };
    for(int i=0;i<3;++i)
    {
        for(int j=0;j<3;++j)
        {
            res[0]+=abs(a[i][j]-b1[i][j]);
            res[1]+=abs(a[i][j]-b2[i][j]);
            res[2]+=abs(a[i][j]-b3[i][j]);
            res[3]+=abs(a[i][j]-b4[i][j]);
            res[4]+=abs(a[i][j]-b5[i][j]);
            res[5]+=abs(a[i][j]-b6[i][j]);
            res[6]+=abs(a[i][j]-b7[i][j]);
            res[7]+=abs(a[i][j]-b8[i][j]);
        }    
    }
    int min=100;
    for(i=0;i<8;++i)
    {if(res[i]<min)
        {min=res[i];}
    }
    printf("%d",min);
    return 0;
}