TASK DEFINITION: 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.
PROBLEM: Sentence: 'a group of five people in white snow outfits cross country skiing'. Reverse all words of length '5' in the given sentence.

SOLUTION: a puorg of five people in etihw snow outfits ssorc country skiing

PROBLEM: Sentence: 'a man that is sitting in a field with a phone'. Reverse all words of length '4' in the given sentence.

SOLUTION: a man taht is sitting in a field htiw a phone

PROBLEM: Sentence: 'decorative street signs on a post in front of trees'. Reverse all words of length '10' in the given sentence.

SOLUTION:
evitaroced street signs on a post in front of trees