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

int main(int argc, char** argv) {

    int first[3][3]={
                        {2,7,6},
                        {9,5,1},
                        {4,3,8}
                    };
    int eighth[3][3]={
                        {4,3,8},
                        {9,5,1},
                        {2,7,6}                        
                    };
    
    int second[3][3]={
                        {4,9,2},
                        {3,5,7},
                        {8,1,6}
                    };
    
    int seventh[3][3]={
                        {8,1,6},
                        {3,5,7},                        
                        {4,9,2}
                    };
    
    
    int third[3][3]={
                        {8,3,4},
                        {1,5,9},
                        {6,7,2}
                    };
    int sixth[3][3]={
                        {6,7,2},
                        {1,5,9},                        
                        {8,3,4}
                    };
    
    
    int forth[3][3]={
                        {6,1,8},
                        {7,5,3},
                        {2,9,4}
                    };
    
    int fifth[3][3]={
                        {2,9,4},    
                        {7,5,3},
                        {6,1,8}                        
                    };
    
    
    int in;
    int a1=0,a2=0,a3=0,a4=0,a5=0,a6=0,a7=0,a8=0;
    for(int i=0;i<3;i++)
    {
        for(int j=0;j<3;j++)
        {
            scanf("%d",&in);
            a1+=abs(in-first[i][j]);
            a2+=abs(in-second[i][j]);
            a3+=abs(in-third[i][j]);
            a4+=abs(in-forth[i][j]);
            a5+=abs(in-fifth[i][j]);
            a6+=abs(in-sixth[i][j]);
            a7+=abs(in-seventh[i][j]);
            a8+=abs(in-eighth[i][j]);            
        }
    }
    int min=a1;
    if(a2<min) min =a2;
    if(a3<min) min =a3;
    if(a4<min) min =a4;
    if(a5<min) min =a5;
    if(a6<min) min =a6;
    if(a7<min) min =a7;
    if(a8<min) min =a8;
    printf("%d",min);
    
    return (EXIT_SUCCESS);
}