Hackerrank day 11 error on webpage but not on spyder - python-3.x

Question

recently I made this code here for the Day 11 of Hackerrank 30 day coding challenge:
arr = [[1,1,1,0,0,0],[0,1,0,0,0,0],[1,1,1,0,0,0],[0,0,2,4,4,0],[0,0,0,2,0,0],[0,0,1,2,4,0]]
f=0
sumas = []
while f<(len(arr)-2):
c = 0
for i in range(len(arr) - 2):
sumas.append((sum(arr[0+f][c:3+c]) + arr[1+f][1+c] + sum(arr[2+f][c:3+c])))
c+=1
f+=1
print(max(sumas))
It takes subarrays from "arr" and sum all the integers on it after that takes the maximum sum number from the subarrays.
When I run my code on spyder works fine but I am getting this error here while running on Hackerrank;
Error (stderr)
Traceback (most recent call last):
File "Solution.py", line 10, in <module>
print(max(sumas))
ValueError: max() arg is an empty sequence
Hope anyone can help me.

Answer 1

the elements in the "I" shape follows this pattern
arr[i][j]+arr[i][j+1]+arr[i][j+2]+arr[i+1][j+1]+arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2]
so we can traverse through the complete array with this
for _ in range(6):
arr.append(list(map(int, input().rstrip().split())))
ans=[]
for i in range(4):
for j in range(4):
su=arr[i][j]+arr[i][j+1]+arr[i][j+2]+arr[i+1][j+1]+arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2]
ans.append(su)
print(max(ans))