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 man and woman standing with luggage in a waiting area'. Reverse all words of length '7' in the given sentence.

Ex Output:
a man and woman standing with egaggul in a gnitiaw area


Ex Input:
Sentence: 'a vase with purple sand and flowers inside'. Reverse all words of length '4' in the given sentence.

Ex Output:
a esav htiw purple dnas and flowers inside


Ex Input:
Sentence: 'three flowers one in a vase are being kept on an outside table'. Reverse all words of length '7' in the given sentence.

Ex Output:

three srewolf one in a vase are being kept on an edistuo table