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.

Example Input: Sentence: 'a couple of beds pushed together inside of a hospital'. Reverse all words of length '6' in the given sentence.
Example Output: a elpuoc of beds dehsup together edisni of a hospital

Example Input: Sentence: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.
Example Output: two young boys gnidnats on grass near a fence

Example Input: Sentence: 'a birthday cake with candles and a cell phone'. Reverse all words of length '4' in the given sentence.
Example Output:
a birthday ekac htiw candles and a llec phone

