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

int main() {
    int solutions[8][9] = {
        {2,7,6,9,5,1,4,3,8},
        {6,7,2,1,5,9,8,3,4},
        {4,9,2,3,5,7,8,1,6},
        {2,9,4,7,5,3,6,1,8},
        {6,1,8,7,5,3,2,9,4},
        {8,1,6,3,5,7,4,9,2},
        {8,3,4,1,5,9,6,7,2},
        {4,3,8,9,5,1,2,7,6},
    };
    
    int minCost = 999999;
    int tempCost;
    
    int square[9];
    for (int i = 0; i < 9; i++) {
        scanf("%d", square+i);
    }
    
    for (int i = 0; i < 8; i++) {
        tempCost = 0;
        for (int j = 0; j < 9; j++) {
            tempCost += abs(square[j]-solutions[i][j]);
        }
        if (tempCost < minCost) {
            minCost = tempCost;
        }
    }
    
    printf("%d", minCost);
    return 0;
}