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 bunch of umbrellas are up in the air'. Reverse all words of length '9' in the given sentence.

Ex Output:
a bunch of sallerbmu are up in the air


Ex Input:
Sentence: 'an orange on a counter next to a bottle of alcohol'. Reverse all words of length '7' in the given sentence.

Ex Output:
an orange on a retnuoc next to a bottle of lohocla


Ex Input:
Sentence: 'a train on a track near a platform'. Reverse all words of length '2' in the given sentence.

Ex Output:

a train no a track near a platform