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.

Ex Input:
Sentence: 'looking down at skiers holding their skis on the ski slope'. Reverse all words of length '7' in the given sentence.

Ex Output:
gnikool down at skiers gnidloh their skis on the ski slope


Ex Input:
Sentence: 'a train platform at a train stop with brick style flooring'. Reverse all words of length '2' in the given sentence.

Ex Output:
a train platform ta a train stop with brick style flooring


Ex Input:
Sentence: 'a close up of several zebras grouped together'. Reverse all words of length '8' in the given sentence.

Ex Output:

a close up of several zebras grouped rehtegot