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 Input: Sentence: 'a cow stretching its head over a fence to eat some leaves'. Remove all words of length '4' in the given sentence.
Example Output: a cow stretching its a fence to eat leaves

Example Input: Sentence: 'an image of a man on skiis jumping in the air'. Remove all words of length '5' in the given sentence.
Example Output: an of a man on jumping in the air

Example Input: Sentence: 'a  middle aged woman running away from a bench'. Remove all words of length '5' in the given sentence.
Example Output:
a middle aged running away from a