import java.util.Scanner;

public class MagicSquareForming {

	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);
		
		int[] magicSquare = new int[9];
		int[] cost = {0, 0, 0, 0, 0, 0, 0, 0};
		int min = 100;
		
		int[][] possibleMagicSquare = { 
				{4, 9, 2, 3, 5, 7, 8, 1, 6}, 
				{2, 7, 6, 9, 5, 1, 4, 3, 8}, 
				{6, 1, 8, 7, 5, 3, 2, 9, 4},
	            {8, 3, 4, 1, 5, 9, 6, 7, 2}, 
	            {2, 9, 4, 7, 5, 3, 6, 1, 8}, 
	            {6, 7, 2, 1, 5, 9, 8, 3, 4},
	            {8, 1, 6, 3, 5, 7, 4, 9, 2}, 
	            {4, 3, 8, 9, 5, 1, 2, 7, 6}
	            };
		
		for (int i = 0; i < magicSquare.length; i++) {
			magicSquare[i] = scanner.nextInt();
		}
		
		for (int i = 0; i < 8; i++) {
			for (int j = 0; j < 9; j++) {
				cost[i] = cost[i] + Math.abs(possibleMagicSquare[i][j] - magicSquare[j]);
			}
		}
		
		for (int i = 0; i < cost.length; i++) {
			
			if (cost[i] < min) {
				min = cost[i];
			}
		}
			
		System.out.println(min);
		
		scanner.close();

	}

}