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: 'the man smiles while holding a small boy'. Reverse all words of length '5' in the given sentence.

Ex Output:
the man smiles elihw holding a llams boy


Ex Input:
Sentence: 'a group of people loading a tour bus'. Reverse all words of length '3' in the given sentence.

Ex Output:
a group of people loading a tour sub


Ex Input:
Sentence: 'a couple of people are standing near a wooden bench'. Reverse all words of length '6' in the given sentence.

Ex Output:

a elpuoc of elpoep are standing near a nedoow bench