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

int main() {
    int digits[9];
    int squares[8][9] = {
        {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},
        {6, 7, 2, 1, 5, 9, 8, 3, 4},
        {2, 7, 6, 9, 5, 1, 4, 3, 8},
        {4, 3, 8, 9, 5, 1, 2, 7, 6},
        {4, 9, 2, 3, 5, 7, 8, 1, 6},
        {2, 9, 4, 7, 5, 3, 6, 1, 8}
    };
    for (int i = 0; i < 9; i++){
        scanf("%i", &digits[i]);
    }  
    int minchange = 100;
    for (int i1 = 0; i1 < 8; i1++){
        int change = 0;
        for (int i2 = 0; i2 < 9; i2++){
            if (digits[i2] < squares[i1][i2])
                change += squares[i1][i2] - digits[i2];
            else if (digits[i2] > squares[i1][i2])
                change += digits[i2] - squares[i1][i2];
        }
        if (minchange > change)
            minchange = change;
    }
    printf("%i", minchange);
    return 0;
}