In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.
Example: Sentence: 'breakfast and a glass of milk is on the table'. Remove all words of length '3' in the given sentence.
Example solution: breakfast a glass of milk is on table
Example explanation: Words 'and', 'the' are of length 3. So they are correctly removed.

Problem: Sentence: 'a cloudy ski with cars on the road below as traffic lights hang above'. Remove all words of length '3' in the given sentence.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Solution: a cloudy with cars on road below as traffic lights hang above