Definition: 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.
Input: Sentence: 'the firetruck carried the firefighters to the fire to put the blaze out'. Reverse all words of length '3' in the given sentence.

eht firetruck carried eht firefighters to eht fire to tup eht blaze tuo