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 mix of vegetables in a pot with a spoon'. Reverse all words of length '4' in the given sentence.

SOLUTION: a mix of vegetables in a pot htiw a spoon

PROBLEM: Sentence: 'a man on a motor bike pulling a person on a skate board'. Reverse all words of length '5' in the given sentence.

SOLUTION: a man on a rotom bike pulling a person on a etaks draob

PROBLEM: Sentence: 'a man standing in the snow and his skis a standing on end with his helmet on top of them'. Reverse all words of length '3' in the given sentence.

SOLUTION:
a nam standing in eht snow dna sih skis a standing on dne with sih helmet on pot of them