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.
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Question: Sentence: 'a person at a zoo looking over the fence of a giraffe enclosure'. Reverse all words of length '6' in the given sentence.

Answer: a nosrep at a zoo looking over the fence of a giraffe enclosure


Question: Sentence: 'a group of people eating a cake on a table'. Reverse all words of length '6' in the given sentence.

Answer: a group of elpoep gnitae a cake on a table


Question: Sentence: 'this is the head of a giraffe standing in a fenced in area'. Reverse all words of length '3' in the given sentence.

Answer:
this is eht head of a giraffe standing in a fenced in area