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: 'two young boys standing on grass near a fence'. Reverse all words of length '8' in the given sentence.
two young boys gnidnats on grass near a fence

Sentence: 'a bus with lots of big tires sitting parked on a street'. Reverse all words of length '6' in the given sentence.
a bus with lots of big tires sitting dekrap on a teerts

Sentence: 'a skiing boat in front of a slow moving passenger boat'. Reverse all words of length '4' in the given sentence.

a skiing taob in front of a wols moving passenger taob