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.

[EX Q]: Sentence: 'the city bus has a feature film ad on the side of it'. Reverse all words of length '4' in the given sentence.
[EX A]: the ytic bus has a feature mlif ad on the edis of it

[EX Q]: Sentence: 'looking down at skiers holding their skis on the ski slope'. Reverse all words of length '7' in the given sentence.
[EX A]: gnikool down at skiers gnidloh their skis on the ski slope

[EX Q]: Sentence: 'man and woman kissing under an umbrella on a lawn at a public performance'. Reverse all words of length '7' in the given sentence.
[EX A]:
man and woman gnissik under an umbrella on a lawn at a public performance