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 small elephant standing next to a forest full of trees'. Reverse all words of length '5' in the given sentence.

Answer: a llams elephant standing next to a forest full of seert


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

Answer: a street filled htiw traffic and a yrev gnol bus


Question: Sentence: 'an old fashioned bathroom with gravity fed toilet and bidet and a gas water heater on the wall'. Reverse all words of length '7' in the given sentence.

Answer:
an old fashioned bathroom with ytivarg fed toilet and bidet and a gas water heater on the wall