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: 'a group of snow boarders pose in the snow on top of a hill'. Reverse all words of length '5' in the given sentence.
[EX A]: a puorg of snow boarders pose in the snow on top of a hill

[EX Q]: Sentence: 'a plate with a very big pile of cake with candles'. Reverse all words of length '4' in the given sentence.
[EX A]: a plate htiw a yrev big elip of ekac htiw candles

[EX Q]: Sentence: 'a black cat rubbing up against a woman laying on a surfboard'. Reverse all words of length '7' in the given sentence.
[EX A]:
a black cat gnibbur up tsniaga a woman laying on a surfboard