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 train billowing smoke as it crosses a river by bridge'. Reverse all words of length '1' in the given sentence.
Example Output: a train billowing smoke as it crosses a river by bridge

Example Input: Sentence: 'a salt and pepper shaker near a plate with food'. Reverse all words of length '3' in the given sentence.
Example Output: a salt dna pepper shaker near a plate with food

Example Input: Sentence: 'an old model firetruck in front of a small establishment'. Reverse all words of length '3' in the given sentence.
Example Output:
an dlo model firetruck in front of a small establishment