In this task, you need to reverse 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 giraffes standing next to a fence trying to reach the grass'. Reverse all words of length '6' in the given sentence.
Example Output: two giraffes standing next to a fence gniyrt to reach the grass

Example Input: Sentence: 'someones living room with tiled flooring and a rocking chair'. Reverse all words of length '3' in the given sentence.
Example Output: someones living room with tiled flooring dna a rocking chair

Example Input: Sentence: 'an umbrella is flying next to a building'. Reverse all words of length '1' in the given sentence.
Example Output:
an umbrella is flying next to a building