import java.io.*;
import java.util.*;

public class Solution {
	
	private static int[][][] generateMagicSquares() {
		int[][][] magicSquares = new int[8][][];
		magicSquares[0] = new int[][] {{2,7,6},{9,5,1},{4,3,8}};
		for (int i = 0; i < 3; i++) {
			magicSquares[i + 1] = rotate(magicSquares[i]);
		}
		for (int i = 0; i < 4; i++) {
			magicSquares[4 + i] = mirror(magicSquares[i]);
		}
		return magicSquares;
	}

	private static int[][] rotate(int[][] m) {
		int[][] ret = new int[3][3];
		ret[0][0] = m[2][0];
		ret[0][1] = m[1][0];
		ret[0][2] = m[0][0];
		ret[1][0] = m[2][1];
		ret[1][1] = m[1][1];
		ret[1][2] = m[0][1];
		ret[2][0] = m[2][2];
		ret[2][1] = m[1][2];
		ret[2][2] = m[0][2];
		return ret;
	}

	private static int[][] mirror(int[][] m) {
		int[][] ret = new int[3][3];
		for (int i = 0; i < 3; i++) {
			for (int j = 0; j < 3; j++) {
				ret[i][j] = m[i][2-j];
			}
		}
		return ret;
	}

	private static int distance(int[][] m, int[][] s) {
		int ret = 0;
		for (int i = 0; i < 3; i++) {
			for (int j = 0; j < 3; j++) {
				ret += Math.abs(m[i][j] - s[i][j]);
			}
		}
		return ret;
	}
	
	public static void main(String[] args) {
		int[][][] magicSquares = generateMagicSquares();
		/*
		 * Enter your code here. Read input from STDIN. Print output to STDOUT.
		 * Your class should be named Solution.
		 */
		Scanner scan = new Scanner(System.in);
		int[][] square = new int[3][3];
		for (int i = 0; i < 3; i++) {
			for (int j = 0; j < 3; j++) {
				square[i][j] = scan.nextInt();
			}
		}
		int minDistance = Integer.MAX_VALUE;
		for (int i = 0; i < magicSquares.length; i++) {
			minDistance = Math.min(minDistance, distance(square, magicSquares[i]));
		}
		System.out.println(minDistance);
	}
	
	private static void printSquare(int[][] square) {
		int[] rowSum = new int [3];
		int[] colSum = new int [3];
		int rightDiagonalTotal = 0;
		int leftDiagonalTotal = 0;
		for (int i = 0; i < 3; i++) {
			rightDiagonalTotal = 0;
			leftDiagonalTotal = 0;
			for (int j = 0; j < 3; j++) {
				rowSum[i] += square[i][j];
				colSum[i] += square[j][i];
				rightDiagonalTotal += square[j][j];
				leftDiagonalTotal += square[2-j][j];
			}
		}
		for (int i = 0; i < 3; i++) {
			System.out.print("   ");
			for(int j = 0; j < 3; j++) {
				System.out.print(square[i][j] + "  ");
			}
			System.out.println(rowSum[i]);
		}
		System.out.print(leftDiagonalTotal + " ");
		for(int j = 0; j < 3; j++) {
			System.out.print(colSum[j] + " ");
		}
		System.out.println(rightDiagonalTotal + " ");
	}
}