import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Arrays;

import java.util.InputMismatchException;
import java.util.Objects;

/**
 *
 * @author anurag verma
 */
  class Chefandfruits {

  
  
    public static void main(String[] args) {
            InputReader in=new InputReader(System.in);
            OutputWriter out=new OutputWriter(System.out);
//            Long r=in.readLong();
//            for(int t=0;t<r;t++)
//            {
              solve(in,out);
//            }
           out.flush();
           out.close();
           
           
    }
 // solution
   
    
   private static void solve(InputReader in, OutputWriter out) {
        
//       
       int[][] as=new int[3][3];
       for(int i=0;i<3;i++)
       {
           for(int j=0;j<3;j++)
           {
               as[i][j]=in.readInt();
               
           }
       }
       int[][] a1={{8,1,6},{3,5,7},{4,9,2}};
       int[][] a2={{4,3,8},{9,5,1},{2,7,6}};
       int[][] a3={{2,9,4},{7,5,3},{6,1,8}};
       int[][] a4={{6,7,2},{1,5,9},{8,3,4}};
       int[][] a5={{6,1,8},{7,5,3},{2,9,4}};
       int[][] a6={{8,3,4},{1,5,9},{6,7,2}};
       int[][] a7={{4,9,2},{3,5,7},{8,1,6}};
       int[][] a8={{2,7,6},{9,5,1},{4,3,8}};
       
       
       int min=Integer.MAX_VALUE;
       int[] sum=new int[8];
       
     
       for(int i=0;i<3;i++ )
           for(int j=0;j<3;j++)
           {
              sum[0]+=Math.abs(as[i][j]-a1[i][j]);
              sum[1]+=Math.abs(as[i][j]-a2[i][j]);
              sum[2]+=Math.abs(as[i][j]-a3[i][j]);
              sum[3]+=Math.abs(as[i][j]-a4[i][j]);
              sum[4]+=Math.abs(as[i][j]-a5[i][j]);
              sum[5]+=Math.abs(as[i][j]-a6[i][j]);
              sum[6]+=Math.abs(as[i][j]-a7[i][j]);
              sum[7]+=Math.abs(as[i][j]-a8[i][j]);
              
           }
      
       for(int i=0;i<8;i++)
       {
          if(sum[i]<min)
          {
              min=sum[i];
          }
       }
       System.out.println(min);
   }
    

 
   //Solution Ends Here

   

   

   
  
   
    
    // Static Part
      private static class InputReader
    {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;
        private SpaceCharFilter filter;
 
        public InputReader(InputStream stream)
        {
            this.stream = stream;
        }
 
        public int read()
        {
            if (numChars == -1)
                throw new InputMismatchException();
            if (curChar >= numChars)
            {
                curChar = 0;
                try
                {
                    numChars = stream.read(buf);
                } catch (IOException e)
                {
                    throw new InputMismatchException();
                }
                if (numChars <= 0)
                    return -1;
            }
            return buf[curChar++];
        }
 
        public int readInt()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-')
            {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
 
        public String readString()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            StringBuilder res = new StringBuilder();
            do
            {
                res.appendCodePoint(c);
                c = read();
            } while (!isSpaceChar(c));
            return res.toString();
        }
        public double readDouble() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            double res = 0;
            while (!isSpaceChar(c) && c != '.') {
                if (c == 'e' || c == 'E')
                    return res * Math.pow(10, readInt());
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            }
            if (c == '.') {
                c = read();
                double m = 1;
                while (!isSpaceChar(c)) {
                    if (c == 'e' || c == 'E')
                        return res * Math.pow(10, readInt());
                    if (c < '0' || c > '9')
                        throw new InputMismatchException();
                    m /= 10;
                    res += (c - '0') * m;
                    c = read();
                }
            }
            return res * sgn;
        }
        public long readLong() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            long res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
        public boolean isSpaceChar(int c)
        {
            if (filter != null)
                return filter.isSpaceChar(c);
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }
 
        public String next()
        {
            return readString();
        }
 
        public interface SpaceCharFilter
        {
            public boolean isSpaceChar(int ch);
        }
    }
 
    private static class OutputWriter
    {
        private final PrintWriter writer;
 
        public OutputWriter(OutputStream outputStream)
        {
            writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
        }
 
        public OutputWriter(Writer writer)
        {
            this.writer = new PrintWriter(writer);
        }
 
        public void print(Object... objects)
        {
            for (int i = 0; i < objects.length; i++)
            {
                if (i != 0)
                    writer.print(' ');
                writer.print(objects[i]);
            }
        }
 
        public void printLine(Object... objects)
        {
            print(objects);
            writer.println();
        }
 
        public void close()
        {
            writer.close();
        }
 
        public void flush()
        {
            writer.flush();
        }
 
    }
}