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.

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

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


Input: Consider Input: Sentence: 'a man laying on a bench and a woman next to him touching his face'. Reverse all words of length '4' in the given sentence.

Output: a man laying on a bench and a woman txen to him touching his ecaf


Input: Consider Input: Sentence: 'a clock surrounded by a bench with people sitting on it at a shopping mall'. Reverse all words of length '7' in the given sentence.


Output: a clock surrounded by a bench with people gnittis on it at a shopping mall