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 man sleeping in bed with a cat lying on him'. Remove all words of length '5' in the given sentence.
Example Output: a man sleeping in bed with a cat on him

Example Input: Sentence: 'a fire hydrant with an out of service sign and a dog in the background'. Remove all words of length '4' in the given sentence.
Example Output: a hydrant an out of service and a dog in the background

Example Input: Sentence: 'brown cow sitting beneath a tree in an open field'. Remove all words of length '4' in the given sentence.
Example Output:
brown cow sitting beneath a in an field