# Write a Python program to find the index of the last element in the given list that satisfies the provided testing function.  
 def find_last_index(lst, fn):
  return len(lst) - 1 - next(i for i, x in enumerate(lst[::-1]) if fn(x))

print(find_last_index([1, 2, 3, 4], lambda n: n % 2 == 1))
