using System;
using System.Collections.Generic;
using System.IO;
class Solution
{
	static void Main(String[] args)
	{
		//-	initialize ALL POSSIBLE magic squares
		int[] m1 = new int[8];
		int[] m2 = new int[8];
		int[] m3 = new int[8];
		int[] m4 = new int[8];
		int[] m5 = new int[8];
		int[] m6 = new int[8];
		int[] m7 = new int[8];
		int[] m8 = new int[8];
		int[] m9 = new int[8];

		m1[0] = 8; m2[0] = 1; m3[0] = 6;
		m4[0] = 3; m5[0] = 5; m6[0] = 7;
		m7[0] = 4; m8[0] = 9; m9[0] = 2;

		m1[1] = 4; m2[1] = 3; m3[1] = 8;
		m4[1] = 9; m5[1] = 5; m6[1] = 1;
		m7[1] = 2; m8[1] = 7; m9[1] = 6;

		m1[2] = 2; m2[2] = 9; m3[2] = 4;
		m4[2] = 7; m5[2] = 5; m6[2] = 3;
		m7[2] = 6; m8[2] = 1; m9[2] = 8;

		m1[3] = 6; m2[3] = 7; m3[3] = 2;
		m4[3] = 1; m5[3] = 5; m6[3] = 9;
		m7[3] = 8; m8[3] = 3; m9[3] = 4;

		m1[4] = 6; m2[4] = 1; m3[4] = 8;
		m4[4] = 7; m5[4] = 5; m6[4] = 3;
		m7[4] = 2; m8[4] = 9; m9[4] = 4;

		m1[5] = 8; m2[5] = 3; m3[5] = 4;
		m4[5] = 1; m5[5] = 5; m6[5] = 9;
		m7[5] = 6; m8[5] = 7; m9[5] = 2;

		m1[6] = 4; m2[6] = 9; m3[6] = 2;
		m4[6] = 3; m5[6] = 5; m6[6] = 7;
		m7[6] = 8; m8[6] = 1; m9[6] = 6;

		m1[7] = 2; m2[7] = 7; m3[7] = 6;
		m4[7] = 9; m5[7] = 5; m6[7] = 1;
		m7[7] = 4; m8[7] = 3; m9[7] = 8;

		/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */

		//-	get the magic square
		string topRowString = Console.ReadLine();
		string middleRowString = Console.ReadLine();
		string bottomRowString = Console.ReadLine();

		string[] topRowStringArray = topRowString.Split(' ');
		string[] middleRowStringArray = middleRowString.Split(' ');
		string[] bottomRowStringArray = bottomRowString.Split(' ');

		int[] topRowArray = new int[3];
		int[] middleRowArray = new int[3];
		int[] bottomRowArray = new int[3];

		int minimumCost = 0;

		topRowArray[0] = Convert.ToInt32(topRowStringArray[0]);
		topRowArray[1] = Convert.ToInt32(topRowStringArray[1]);
		topRowArray[2] = Convert.ToInt32(topRowStringArray[2]);

		middleRowArray[0] = Convert.ToInt32(middleRowStringArray[0]);
		middleRowArray[1] = Convert.ToInt32(middleRowStringArray[1]);
		middleRowArray[2] = Convert.ToInt32(middleRowStringArray[2]);

		bottomRowArray[0] = Convert.ToInt32(bottomRowStringArray[0]);
		bottomRowArray[1] = Convert.ToInt32(bottomRowStringArray[1]);
		bottomRowArray[2] = Convert.ToInt32(bottomRowStringArray[2]);

		minimumCost = GetMinimumCost(topRowArray, middleRowArray, bottomRowArray, m1, m2, m3, m4, m5, m6, m7, m8, m9);

		Console.WriteLine(minimumCost);
	}

	static int GetMinimumCost (int [] topRowArray, int[] middleRowArray, int[] bottomRowArray,
								int[] m1, int[] m2, int[] m3, int[] m4, int[] m5, int[] m6, int[] m7, int[] m8, int[] m9)
	{
		int minimumCost = 72;
		int cost = 0;

		for (int magicSquareIndex = 0; magicSquareIndex < 8; magicSquareIndex++)
		{
			cost =    Math.Abs(topRowArray[0] - m1[magicSquareIndex])
					+ Math.Abs(topRowArray[1] - m2[magicSquareIndex])
					+ Math.Abs(topRowArray[2] - m3[magicSquareIndex])
					+ Math.Abs(middleRowArray[0] - m4[magicSquareIndex])
					+ Math.Abs(middleRowArray[1] - m5[magicSquareIndex])
					+ Math.Abs(middleRowArray[2] - m6[magicSquareIndex])
					+ Math.Abs(bottomRowArray[0] - m7[magicSquareIndex])
					+ Math.Abs(bottomRowArray[1] - m8[magicSquareIndex])
					+ Math.Abs(bottomRowArray[2] - m9[magicSquareIndex]);

			if (cost < minimumCost)
			{
				minimumCost = cost;
			}
		}

		return minimumCost;
	}
}