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 sitting next to a woman on a couch is playing a video game'. Remove all words of length '2' in the given sentence.
Example Output: a man sitting next a woman a couch playing a video game

Example Input: Sentence: 'tourists sit at a park while watching others in canoes'. Remove all words of length '8' in the given sentence.
Example Output: sit at a park while others in canoes

Example Input: Sentence: 'a red and white boat sitting on a beach'. Remove all words of length '3' in the given sentence.
Example Output:
a white boat sitting on a beach