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.

Sentence: 'a bunch of umbrellas are up in the air'. Reverse all words of length '9' in the given sentence.
a bunch of sallerbmu are up in the air

Sentence: 'a close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.
a close up of eht front of a train on train tracks

Sentence: 'a man and a child that are standing in the dirt'. Reverse all words of length '2' in the given sentence.

a man and a child that are standing ni the dirt