#include <iostream>
#include <cmath>
#include <algorithm>
int main()
{
	int arr1[3][3]={8,1,6,3,5,7,4,9,2};
	int arr2[3][3]={6,1,8,7,5,3,2,9,4};
	int arr3[3][3]={4,9,2,3,5,7,8,1,6};
	int arr4[3][3]={2,9,4,7,5,3,6,1,8};
	int arr5[3][3]={8,3,4,1,5,9,6,7,2};
	int arr6[3][3]={4,3,8,9,5,1,2,7,6};
	int arr7[3][3]={6,7,2,1,5,9,8,3,4};
	int arr8[3][3]={2,7,6,9,5,1,4,3,8};
	int input[3][3]={0},ans1=0,ans2=0,ans3=0,ans4=0,ans5=0,ans6=0,ans7=0,ans8=0;
	
	for(size_t i=0;i<3;i++)
	{
		for(size_t j=0;j<3;j++)
			std::cin>>input[i][j];
	}
	for(size_t i=0;i<3;i++)
	{
		for(size_t j=0;j<3;j++)
		{	//std::cout<<arr1[i][j] <<" "<<input[i][j]<<"\n";
			ans1=ans1+fabs(arr1[i][j]-input[i][j]); 


			ans2=ans2+fabs(arr2[i][j]-input[i][j]);	
			ans3=ans3+fabs(arr3[i][j]-input[i][j]);	
			ans4=ans4+fabs(arr4[i][j]-input[i][j]);
			ans5=ans5+fabs(arr5[i][j]-input[i][j]);
			ans6=ans6+fabs(arr6[i][j]-input[i][j]);
			ans7=ans7+fabs(arr7[i][j]-input[i][j]);	
			ans8=ans8+fabs(arr8[i][j]-input[i][j]);	
			
		}
		
	}
	
	std::cout<<std::min(ans1,std::min(ans2,std::min(ans3,std::min(ans4,std::min(ans5,std::min(ans6,std::min(ans7,ans8)))))))<<"\n";
	
	return 0;
}