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.

Ex Input:
Sentence: 'a small elephant standing next to a forest full of trees'. Reverse all words of length '5' in the given sentence.

Ex Output:
a llams elephant standing next to a forest full of seert


Ex Input:
Sentence: 'several stacks of trunks in front of a building'. Reverse all words of length '8' in the given sentence.

Ex Output:
several stacks of trunks in front of a gnidliub


Ex Input:
Sentence: 'a woman with an umbrella is hurrying across the street'. Reverse all words of length '1' in the given sentence.

Ex Output:

a woman with an umbrella is hurrying across the street