//Author: Koppu
#include <stdio.h>
#include <stdlib.h>

int magic_square(int p[][3]) {
	int i, j;
	int min;
	int res[8] = {0};
	int sum = 0;
	int a1[3][3] = {{8,1,6}, {3,5,7}, {4,9,2}};
	int a2[3][3] = {{4,3,8}, {9,5,1}, {2,7,6}};
	int a3[3][3] = {{2,9,4}, {7,5,3}, {6,1,8}};
	int a4[3][3] = {{6,7,2}, {1,5,9}, {8,3,4}};
	int a5[3][3] = {{6,1,8}, {7,5,3}, {2,9,4}};
	int a6[3][3] = {{8,3,4}, {1,5,9}, {6,7,2}};
	int a7[3][3] = {{4,9,2}, {3,5,7}, {8,1,6}};
	int a8[3][3] = {{2,7,6}, {9,5,1}, {4,3,8}};

	for(i = 0; i < 3; i++){
		for(j = 0; j < 3; j++){
			res[0] = res[0] + abs(a1[i][j] - p[i][j]);
			res[1] = res[1] + abs(a2[i][j] - p[i][j]);
			res[2] = res[2] + abs(a3[i][j] - p[i][j]);
			res[3] = res[3] + abs(a4[i][j] - p[i][j]);
			res[4] = res[4] + abs(a5[i][j] - p[i][j]);
			res[5] = res[5] + abs(a6[i][j] - p[i][j]);
			res[6] = res[6] + abs(a7[i][j] - p[i][j]);
			res[7] = res[7] + abs(a8[i][j] - p[i][j]);
		}
	}
	min = res[0];
	for(i = 1; i < 8; i++) {
		if(res[i] < min)
			min = res[i];
	}
	return min;
}

int main(void) {
	int a[3][3];
	int i, j;
	for(i = 0; i < 3; i++) {
		for(j = 0; j < 3; j++) {
			scanf("%d", &a[i][j]);
		}
	}
	printf("%d", magic_square(a));
	return 0;
}