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 dog curled up sleeping on a bed with pillows'. Reverse all words of length '6' in the given sentence.
Example Output: a dog delruc up sleeping on a bed with pillows

Example Input: Sentence: 'three young men on a beach leap toward a frisbee'. Reverse all words of length '1' in the given sentence.
Example Output: three young men on a beach leap toward a frisbee

Example Input: Sentence: 'a train that is stationary at the station waiting for passengers'. Reverse all words of length '10' in the given sentence.
Example Output:
a train that is yranoitats at the station waiting for sregnessap