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: 'a street filled with traffic and a very long bus'. Reverse all words of length '4' in the given sentence.

A: a street filled htiw traffic and a yrev gnol bus
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Q: Sentence: 'looking down at skiers holding their skis on the ski slope'. Reverse all words of length '7' in the given sentence.

A: gnikool down at skiers gnidloh their skis on the ski slope
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Q: Sentence: 'group of people and horses in a grassy area next to trees'. Reverse all words of length '2' in the given sentence.

A:
group fo people and horses ni a grassy area next ot trees
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