import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Sol {

    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int[][] a = new int[3][3];
        String[] s;
        int i, j, k;
        for (i = 0; i < 3; i++) {
            s = reader.readLine().split(" ");
            for (j = 0; j < 3; j++) {
                a[i][j] = Integer.parseInt(s[j]);
            }
        }

        int[][][] m = {
                {{8, 1, 6}, {3, 5, 7}, {4, 9, 2}},
                {{6, 1, 8}, {7, 5, 3}, {2, 9, 4}},
                {{8, 3, 4}, {1, 5, 9}, {6, 7, 2}},
                {{6, 7, 2}, {1, 5, 9}, {8, 3, 4}},
                {{4, 3, 8}, {9, 5, 1}, {2, 7, 6}},
                {{2, 7, 6}, {9, 5, 1}, {4, 3, 8}},
                {{4, 9, 2}, {3, 5, 7}, {8, 1, 6}},
                {{2, 9, 4}, {7, 5, 3}, {6, 1, 8}}
        };

        int cost, min = Integer.MAX_VALUE;
        for (i = 0; i < 8; i++) {
            cost = 0;
            for (j = 0; j < 3; j++) {
                for (k = 0; k < 3; k++) {
                    cost += Math.abs(m[i][j][k] - a[j][k]);
                }
            }
            if (cost < min) {
                min = cost;
            }
        }
        System.out.println(min);
        reader.close();
    }

}