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 man assisting a person on a horse on a race track'. Reverse all words of length '3' in the given sentence.

Ex Output:
a nam assisting a person on a horse on a race track


Ex Input:
Sentence: 'a couple walking in the rain using and umbrella'. Reverse all words of length '6' in the given sentence.

Ex Output:
a elpuoc walking in the rain using and umbrella


Ex Input:
Sentence: 'a motorcycle on display on black carpet surrounded by a red rope'. Reverse all words of length '1' in the given sentence.

Ex Output:

a motorcycle on display on black carpet surrounded by a red rope