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 small child having his teeth brushed by an adult'. Reverse all words of length '7' in the given sentence.
a small child having his teeth dehsurb by an adult

Sentence: 'a person that has their skis crossed in the air as they snow ski'. Reverse all words of length '4' in the given sentence.
a person taht has their siks crossed in the air as yeht wons ski

Sentence: 'a small child standing on a skateboard with an adult steadying her balance'. Reverse all words of length '2' in the given sentence.

a small child standing no a skateboard with na adult steadying her balance