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 person that has their skis crossed in the air as they snow ski'. Reverse all words of length '4' in the given sentence.

SOLUTION: a person taht has their siks crossed in the air as yeht wons ski

PROBLEM: Sentence: 'a group of snow boarders pose in the snow on top of a hill'. Reverse all words of length '5' in the given sentence.

SOLUTION: a puorg of snow boarders pose in the snow on top of a hill

PROBLEM: Sentence: 'a lady standing on the roadside holding a pink umbrella with a large field and mountains behind her'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a lady standing on eht roadside holding a pink umbrella with a large field dna mountains behind reh