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 crowd of people skiing and enjoying the snow'. Reverse all words of length '4' in the given sentence.

Output: a crowd of people skiing and enjoying the wons


Input: Consider Input: Sentence: 'a vintage photo of a man riding an old motorcycle'. Reverse all words of length '7' in the given sentence.

Output: a egatniv photo of a man riding an old motorcycle


Input: Consider Input: Sentence: 'the train is sitting empty on the tracks'. Reverse all words of length '2' in the given sentence.


Output: the train si sitting empty no the tracks