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.

Input: Consider Input: Sentence: 'a small bird sitting on the rim of a fountain'. Reverse all words of length '7' in the given sentence.

Output: a small bird gnittis on the rim of a fountain


Input: Consider Input: Sentence: 'a dog sitting in the passenger seat of a vehicle'. Reverse all words of length '9' in the given sentence.

Output: a dog sitting in the regnessap seat of a vehicle


Input: Consider Input: Sentence: 'a young cow looking forward while several others drink at a trough in the background'. Reverse all words of length '6' in the given sentence.


Output: a young cow looking forward while several srehto drink at a hguort in the background