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 knife sits next to a carrot on a cutting board'. Reverse all words of length '7' in the given sentence.

Ex Output:
a knife sits next to a carrot on a gnittuc board


Ex Input:
Sentence: 'an old traditional pirate ship in modern city'. Reverse all words of length '3' in the given sentence.

Ex Output:
an dlo traditional pirate ship in modern city


Ex Input:
Sentence: 'a pile of potted plants sitting in front of a store front'. Reverse all words of length '7' in the given sentence.

Ex Output:

a pile of potted plants gnittis in front of a store front