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 riding a bike down a street past cars'. Reverse all words of length '4' in the given sentence.

Ex Output:
a man riding a ekib nwod a street tsap srac


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: 'two military personnel cutting into a large cake'. Reverse all words of length '4' in the given sentence.

Ex Output:

two military personnel cutting otni a large ekac