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: 'an openair tour bus driving in a city'. Reverse all words of length '7' in the given sentence.

Ex Output:
an rianepo tour bus gnivird in a city


Ex Input:
Sentence: 'many vegetables are on the green kitchen counter'. Reverse all words of length '7' in the given sentence.

Ex Output:
many vegetables are on the green nehctik retnuoc


Ex Input:
Sentence: 'a man in a suit holding a skateboard is waiting to cross'. Reverse all words of length '4' in the given sentence.

Ex Output:

a man in a tius holding a skateboard is waiting to cross