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 group of zebras gather at a watering hole'. Reverse all words of length '1' in the given sentence.

Answer: a group of zebras gather at a watering hole


Question: Sentence: 'a keyboard a mouse a monitor and a brown table'. Reverse all words of length '3' in the given sentence.

Answer: a keyboard a mouse a monitor dna a brown table


Question: Sentence: 'the black cat is playing with someones foot'. Reverse all words of length '7' in the given sentence.

Answer:
the black cat is gniyalp with someones foot