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

Ex Output:
a crowd of people skiing and enjoying the wons


Ex Input:
Sentence: 'the cox is standing behind the fence alone'. Reverse all words of length '2' in the given sentence.

Ex Output:
the cox si standing behind the fence alone


Ex Input:
Sentence: 'a skateboarder doing a trick on a ramp'. Reverse all words of length '2' in the given sentence.

Ex Output:

a skateboarder doing a trick no a ramp