// Complete the hourglassSum function below.
    static int hourglassSum(int[][] arr) {
     
     int[] s=new int[16];
     int j=0,sum=0;
     int extraI=0,extraJ=0;
     while(extraJ<=3)
      {
       extraI=0;
        while(extraI<=3)
         {
           for(j=extraJ;j<extraJ+2;j++)
             {
               for(int i=extraI;i<extraI+2;i++)
               {
                 sum=sum+arr[i][j];
               }
             }
             boolean flag=false;
            for(int counter=0;counter<s.length;counter++)
            {
                System.out.println("Inside Sum Loop!!!");
               s[k]=sum;
            }
            
            
           extraI++;
         }//end of extraI while
     extraJ++;
     }//end of extraJ while

   int max=s[0];
   for(int i=0;i<s.length;i++)
      {
         if(s[i]>max)
          {
            max=s[i];
          }
      }
     return max;
    }//end of Method