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 man stands in front of one of three toilets'. Remove all words of length '1' in the given sentence.
Example Output: man stands in front of one of three toilets

Example Input: Sentence: 'a group of people sitting around a white table'. Remove all words of length '6' in the given sentence.
Example Output:
a group of sitting a white table