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 stack of donuts sitting on a piece of paper'. Remove all words of length '7' in the given sentence.
Example Output: a stack of donuts on a piece of paper

Example Input: Sentence: 'a young man holding a yellow surfboard on top of a grass field'. Remove all words of length '2' in the given sentence.
Example Output: a young man holding a yellow surfboard top a grass field

Example Input: Sentence: 'a dog climbing on top of a woman sitting on a blue bench'. Remove all words of length '8' in the given sentence.
Example Output:
a dog on top of a woman sitting on a blue bench