def hourglassSum(arr):
    # Write your code here
    max_sum = float("-inf")
    for i in range(0, 4):
        for j in range(0, 4):
            top = arr[i][j] + arr[i][j+1] + arr[i][j+2]
            middle = arr[i+1][j+1]
            buttom = arr[i+2][j] +arr[i+2][j+1] + arr[i+2][j+2]
            hg_sum = top + middle + buttom
            if hg_sum > max_sum:
                max_sum = hg_sum
    return max_sum