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 pair of melted scissors on top of a reflective surface'. Reverse all words of length '7' in the given sentence.

Output: a pair of melted scissors on top of a reflective ecafrus


Input: Consider Input: Sentence: 'a male cow walking down a street with shanties'. Reverse all words of length '7' in the given sentence.

Output: a male cow gniklaw down a street with shanties


Input: Consider Input: Sentence: 'the train tracks are empty in the middle of the town'. Reverse all words of length '2' in the given sentence.


Output: the train tracks are empty ni the middle fo the town