import java.util.*;
class Solution
{
    static int[][] mat= new int[20][20];
    static int greatestone=0;
    static void checkVerticalFwd(int x, int y)
    {
        if((x+3)>=20)
        {
            return;
        }
        int temp= mat[x][y];
        temp*=mat[x+1][y];
        temp*=mat[x+2][y];
        temp*=mat[x+3][y];
        if(temp>greatestone)
        {
            greatestone=temp;
        }
    }
     static void checkHorizontalFwd(int x, int y)
    {
        if((y+3)>=20)
        {
            return;
        }
        int temp= mat[x][y];
        temp*=mat[x][y+1];
        temp*=mat[x][y+2];
        temp*=mat[x][y+3];
        if(temp>greatestone)
        {
            greatestone=temp;
        }
    }
     static void DiagRight(int x, int y)
    {
        if((x+3)>=20|| y + 3 >=20)
        {
            return;
        }
        int temp= mat[x][y];
        temp*=mat[x+1][y+1];
        temp*=mat[x+2][y+2];
        temp*=mat[x+3][y+3];
        if(temp>greatestone)
        {
            greatestone=temp;
        }
    }
    static void DiagLeft(int x, int y)
    {
        if((x+3)>=20||(y - 3) < 0)
        {
            return;
        }
        int temp= mat[x][y];
        temp*=mat[x+1][y-1];
        temp*=mat[x+2][y-2];
        temp*=mat[x+3][y-3];
        if(temp>greatestone)
        {
            greatestone=temp;
        }
    }
    public static void main(String[] args)
    {
        Scanner scn = new Scanner(System.in);
        
         for(int x = 0; x < 20; x++){
                for(int y = 0; y < 20; y++){
                    mat[x][y] = scn.nextInt();
                }
            }
        
            for(int x = 0; x < 20; x++) {
                for(int y = 0; y < 20; y++) {
                    checkVerticalFwd(x, y);
                    checkHorizontalFwd(x,y);
                    DiagRight(x,y);
                    DiagLeft(x,y) ;
                }
								System.out.println(greatestone);