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.
--------
Question: Sentence: 'a group of people wearing skis and standing at the top of a ski slope'. Reverse all words of length '7' in the given sentence.

Answer: a group of people gniraew skis and standing at the top of a ski slope


Question: Sentence: 'an old traditional pirate ship in modern city'. Reverse all words of length '3' in the given sentence.

Answer: an dlo traditional pirate ship in modern city


Question: Sentence: 'a crowd of people standing next to each other raising their first'. Reverse all words of length '7' in the given sentence.

Answer:
a crowd of people standing next to each other gnisiar their first


