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 meal consisting of greens rice meat in sauce and banana'. Reverse all words of length '4' in the given sentence.
a laem consisting of greens ecir taem in sauce and banana

Sentence: 'several stacks of trunks in front of a building'. Reverse all words of length '8' in the given sentence.
several stacks of trunks in front of a gnidliub

Sentence: 'a group of giraffes walk across an open area'. Reverse all words of length '8' in the given sentence.

a group of seffarig walk across an open area