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: 'two men sit on the couch one is holding wii remotes'. Reverse all words of length '3' in the given sentence.

owt nem tis on eht couch eno is holding iiw remotes