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: 'black and silver fire hydrant sitting next to a road'. Reverse all words of length '7' in the given sentence.

Ex Output:
black and silver fire tnardyh gnittis next to a road


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 man is flying a kite in a field'. Reverse all words of length '2' in the given sentence.

Ex Output:

a man si flying a kite ni a field