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 motorcycle riders one with a side car'. Reverse all words of length '6' in the given sentence.

SOLUTION: a group of motorcycle sredir one with a side car

PROBLEM: Sentence: 'a cat stinking its tongue out beside food'. Reverse all words of length '1' in the given sentence.

SOLUTION: a cat stinking its tongue out beside food

PROBLEM: Sentence: 'a group of young skiers skiing down a gentle slope'. Reverse all words of length '1' in the given sentence.

SOLUTION:
a group of young skiers skiing down a gentle slope