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 sail boat riding through the water while an airplane takes off in the background'. Remove all words of length '2' in the given sentence.
Example Output: a sail boat riding through the water while airplane takes off the background

Example Input: Sentence: 'a dog that is laying down on a blanket'. Remove all words of length '4' in the given sentence.
Example Output: a dog is laying on a blanket

Example Input: Sentence: 'a man on horse shaped red light above a street'. Remove all words of length '2' in the given sentence.
Example Output:
a man horse shaped red light above a street