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 group of people sitting on a wooden bench'. Reverse all words of length '1' in the given sentence.
a group of people sitting on a wooden bench

Sentence: 'a man and women embracing each other in front of trees'. Reverse all words of length '4' in the given sentence.
a man and women embracing hcae other in front of trees

Sentence: 'a ride operator watches over a surfing ride while children play'. Reverse all words of length '8' in the given sentence.

a ride rotarepo watches over a surfing ride while nerdlihc play