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


/**
 *
 * @author Umang Upadhyay
 */
public class MagicSquareForming {
    
    public static void main(String[] args) {
        
        InputReader in = new InputReader(System.in);
        PrintWriter w = new PrintWriter(System.out);

        int[][] arr = new int[3][3];
        int[][] a1 = new int[3][3];
        int[][] a2 = new int[3][3];
        int[][] a3 = new int[3][3];
        int[][] a4 = new int[3][3];
        int[][] a5 = new int[3][3];
        int[][] a6 = new int[3][3];
        int[][] a7 = new int[3][3];
        int[][] a8 = new int[3][3];
        int i,j;
        int cost=0;
        
        
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                arr[i][j]=in.nextInt();
            }
        }
        
        a1[0][0]=2;
        a1[0][1]=7;
        a1[0][2]=6;
        a1[1][0]=9;
        a1[1][1]=5;
        a1[1][2]=1;
        a1[2][0]=4;
        a1[2][1]=3;
        a1[2][2]=8;

        a2[0][0]=2;
        a2[0][1]=9;
        a2[0][2]=4;
        a2[1][0]=7;
        a2[1][1]=5;
        a2[1][2]=3;
        a2[2][0]=6;
        a2[2][1]=1;
        a2[2][2]=8;        
        
        a3[0][0]=6;
        a3[0][1]=7;
        a3[0][2]=2;
        a3[1][0]=1;
        a3[1][1]=5;
        a3[1][2]=9;
        a3[2][0]=8;
        a3[2][1]=3;
        a3[2][2]=4;
        
        a4[0][0]=6;
        a4[0][1]=1;
        a4[0][2]=8;
        a4[1][0]=7;
        a4[1][1]=5;
        a4[1][2]=3;
        a4[2][0]=2;
        a4[2][1]=9;
        a4[2][2]=4;

        a5[0][0]=4;
        a5[0][1]=3;
        a5[0][2]=8;
        a5[1][0]=9;
        a5[1][1]=5;
        a5[1][2]=1;
        a5[2][0]=2;
        a5[2][1]=7;
        a5[2][2]=6;
        
        a6[0][0]=4;
        a6[0][1]=9;
        a6[0][2]=2;
        a6[1][0]=3;
        a6[1][1]=5;
        a6[1][2]=7;
        a6[2][0]=8;
        a6[2][1]=1;
        a6[2][2]=6;
        
        a7[0][0]=8;
        a7[0][1]=3;
        a7[0][2]=4;
        a7[1][0]=1;
        a7[1][1]=5;
        a7[1][2]=9;
        a7[2][0]=6;
        a7[2][1]=7;
        a7[2][2]=2;

        a8[0][0]=8;
        a8[0][1]=1;
        a8[0][2]=6;
        a8[1][0]=3;
        a8[1][1]=5;
        a8[1][2]=7;
        a8[2][0]=4;
        a8[2][1]=9;
        a8[2][2]=2;
        
        int min=1000000;
        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a1[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a2[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a3[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a4[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a5[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a6[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a7[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;

        cost=0;
        for(i=0;i<3;i++){
            for(j=0;j<3;j++){
                cost+=Math.abs(a8[i][j]-arr[i][j]);
            }
        }
        if(cost<min) min=cost;
        
        w.print(min);
        w.close();
        
    }
    
    static class InputReader {

		private final InputStream stream;
		private final byte[] buf = new byte[8192];
		private int curChar, snumChars;
		private SpaceCharFilter filter;

		public InputReader(InputStream stream) {
			this.stream = stream;
		}

		public int snext() {
			if (snumChars == -1)
				throw new InputMismatchException();
			if (curChar >= snumChars) {
				curChar = 0;
				try {
					snumChars = stream.read(buf);
				} catch (IOException e) {
					throw new InputMismatchException();
				}
				if (snumChars <= 0)
					return -1;
			}
			return buf[curChar++];
		}

		public int nextInt() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = snext();
			}
			int res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = snext();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		public long nextLong() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = snext();
			}
			long res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = snext();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		public int[] nextIntArray(int n) {
			int a[] = new int[n];
			for (int i = 0; i < n; i++)
				a[i] = nextInt();
			return a;
		}

		public String readString() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = snext();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		public boolean isSpaceChar(int c) {
			if (filter != null)
				return filter.isSpaceChar(c);
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		public interface SpaceCharFilter {
			public boolean isSpaceChar(int ch);
		}
	}
}