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: 'two large birds strutting inside of a fence'. Remove all words of length '5' in the given sentence.
Example Output: two strutting inside of a

Example Input: Sentence: 'a old building that has a big clock on top'. Remove all words of length '4' in the given sentence.
Example Output: a old building has a big clock on top

Example Input: Sentence: 'a person holding a cell phone next to many others'. Remove all words of length '6' in the given sentence.
Example Output:
a holding a cell phone next to many