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.

Q: Sentence: 'several people flying kites on a sandy beach'. Reverse all words of length '7' in the given sentence.

A: lareves people flying kites on a sandy beach
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Q: Sentence: 'two doubledecker buses are parked at a bus stop next to some buildings with another doubledecker bus on the road going the other direction behind them'. Reverse all words of length '1' in the given sentence.

A: two doubledecker buses are parked at a bus stop next to some buildings with another doubledecker bus on the road going the other direction behind them
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Q: Sentence: 'an elephant stands alone in the grass and sunlight'. Reverse all words of length '3' in the given sentence.

A:
an elephant stands alone in eht grass dna sunlight
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