def hourglassSum(arr):
    # Write your code here
    sol=float("-inf")
    for i in range(len(arr)-2):
        for j in range(len(arr)-2):
            top=arr[i][j]+arr[i][j+1]+arr[i][j+2]
            middle=arr[i+1][j+1]
            bottom=arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2]
            current_sol=top+middle+bottom
            if current_sol>sol:
                sol=current_sol
    return sol