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: 'two gentleman playing video games in the living room'. Remove all words of length '4' in the given sentence.
Example Output: two gentleman playing video games in the living

Example Input: Sentence: 'an ancient looking town with no people'. Remove all words of length '7' in the given sentence.
Example Output:
an town with no people