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: 'a man bending over while holding a baby to blow out lit candles on a cake'. Reverse all words of length '3' in the given sentence.

a nam bending over while holding a baby to blow tuo til candles on a cake