#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int b[9],cc=0,sol=9999,i,j;
    int a[8][9]={{8,1,6,3,5,7,4,9,2},{6,1,8,7,5,3,2,9,4},{4,9,2,3,5,7,8,1,6},{2,9,4,7,5,3,6,1,8},{8,3,4,1,5,9,6,7,2},{4,3,8,9,5,1,2,7,6},{6,7,2,1,5,9,8,3,4},{2, 7, 6, 9, 5, 1, 4, 3, 8}};
for(i=0;i<9;i++){ cin>>b[i]; }
for (i=0;i<8;i++){
    cc=0;
    for(j=0;j<9;j++){
        cc=cc+int(abs(a[i][j]-b[j]));
    }
    if(cc<sol){

    sol=cc;//finding least cost
}}
    cout<<sol;
    return 0;
}