#include<iostream>
#include<math.h>
#include<stdlib.h>
using namespace std;
int main()
{
int s[9];
int m1[9]={2,7,6,9,5,1,4,3,8};
int m2[9]={4,9,2,3,5,7,8,1,6};
int m3[9]={6,1,8,7,5,3,2,9,4};
int m4[9]={8,3,4,1,5,9,6,7,2};
int m5[9]={8,1,6,3,5,7,4,9,2};
int m6[9]={2,9,4,7,5,3,6,1,8};
int m7[9]={4,3,8,9,5,1,2,7,6};
int m8[9]={6,7,2,1,5,9,8,3,4};
int sum1=0;
int sum2=0;
int sum3=0;
int sum4=0;
int sum5=0;
int sum6=0;
int sum7=0;
int sum8=0;
int temp;
for(int i=0;i<9;i++)
{
	cin>>s[i];
}
for(int i=0;i<9;i++)
{
	sum1+=abs(s[i]-m1[i]);
	sum2+=abs(s[i]-m2[i]);
	sum3+=abs(s[i]-m3[i]);
	sum4+=abs(s[i]-m4[i]);
	sum5+=abs(s[i]-m5[i]);
	sum6+=abs(s[i]-m6[i]);
	sum7+=abs(s[i]-m7[i]);
	sum8+=abs(s[i]-m8[i]);	
}
if(sum1<=sum2 && sum1<=sum3 && sum1<=sum4 && sum1<=sum5 &&sum1<=sum6 && sum1<=sum7 && sum1<=sum8)
cout<<sum1;
else if(sum2<=sum1 && sum2<=sum3 && sum2<=sum4 && sum2<=sum5 &&sum2<=sum6 && sum2<=sum7 && sum2<=sum8)
cout<<sum2;
else if(sum3<=sum2 && sum3<=sum1 && sum3<=sum4 && sum3<=sum5 &&sum3<=sum6 && sum3<=sum7 && sum3<=sum8)
cout<<sum3;
else if(sum5<=sum2 && sum5<=sum1 && sum5<=sum4 && sum3>=sum5 &&sum5<=sum6 && sum5<=sum7 && sum5<=sum8)
cout<<sum5;
else if(sum6<=sum2 && sum6<=sum1 && sum6<=sum4 && sum6<=sum5 &&sum3>=sum6 && sum6<=sum7 && sum6<=sum8)
cout<<sum6;
else if(sum7<=sum2 && sum7<=sum1 && sum7<=sum4 && sum7<=sum5 &&sum7<=sum6 && sum3>=sum7 && sum7<=sum8)
cout<<sum7;
else if(sum8<=sum2 && sum8<=sum1 && sum8<=sum4 && sum8<=sum5 &&sum8<=sum6 && sum8<=sum7 && sum3>=sum8)
cout<<sum8;
else
cout<<sum4;
	return 0;
}