int hourglassSum(int arr_rows, int arr_columns, int** arr) {
    int maxsum = -100; 

    for(int i=0 ; i<4; i++){//rows
        for(int j=0; j<4; j++){//columns
            
            int sum1 = arr[i][j] + arr[i][j+1] + arr[i][j+2]  ; 
            int sum2 = arr[i+1][j+1] ;
            int sum3 = arr[i+2][j] + arr[i+2][j+1] + arr[i+2][j+2]  ;
            int sum = sum1 + sum2 + sum3 ;
            
            if(sum > maxsum){ maxsum = sum ; }
        } 
    }
    return maxsum ;
}