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 gray teddy bear sitting behind an alarm clock'. Remove all words of length '6' in the given sentence.
Example Output: a gray teddy bear sitting an alarm clock

Example Input: Sentence: 'a wood bench is sitting near a pole'. Remove all words of length '7' in the given sentence.
Example Output: a wood bench is near a pole

Example Input: Sentence: 'a large black cat laying on a tiled floor'. Remove all words of length '3' in the given sentence.
Example Output:
a large black laying on a tiled floor