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 train station focused on the clock above the ticket office'. Remove all words of length '7' in the given sentence.
Example Output: a train on the clock above the ticket office

Example Input: Sentence: 'the black and white zebras congregate as a pack in the field'. Remove all words of length '4' in the given sentence.
Example Output: the black and white zebras congregate as a in the field

Example Input: Sentence: 'an animation plays in the background on the tv within the living room'. Remove all words of length '6' in the given sentence.
Example Output:
an animation plays in the background on the tv the room