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: 'a snowy hill with a tree lined area'. Reverse all words of length '4' in the given sentence.

Ex Output:
a snowy llih htiw a eert lined aera


Ex Input:
Sentence: 'three people with backpacks on skies moving up a hill'. Reverse all words of length '9' in the given sentence.

Ex Output:
three people with skcapkcab on skies moving up a hill


Ex Input:
Sentence: 'people hiking in snow on a sunny day'. Reverse all words of length '4' in the given sentence.

Ex Output:

people hiking in wons on a sunny day