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 baby elephant in the middle of a field'. Reverse all words of length '3' in the given sentence.

Output: a baby elephant in eht middle of a field


Input: Consider Input: Sentence: 'a guy on  a surf board by a very big wave'. Reverse all words of length '3' in the given sentence.

Output: a yug on a surf board by a very gib wave


Input: Consider Input: Sentence: 'a pair of young men stand in a field playing with a frisbee'. Reverse all words of length '3' in the given sentence.


Output: a pair of young nem stand in a field playing with a frisbee