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 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 walking in the shore with a surfboard under his arm'. Reverse all words of length '3' in the given sentence.

SOLUTION: a nam walking in eht shore with a surfboard under sih mra

PROBLEM: Sentence: 'a kid is on a track on a pair of skis'. Reverse all words of length '5' in the given sentence.

SOLUTION:
a kid is on a kcart on a pair of skis