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: 'several people flying kites on a sandy beach'. Reverse all words of length '7' in the given sentence.

Output: lareves people flying kites on a sandy beach


Input: Consider Input: Sentence: 'a black cow stands alone in a grassy field'. Reverse all words of length '3' in the given sentence.

Output: a black woc stands alone in a grassy field


Input: Consider Input: Sentence: 'a sink and a bathtub and shower with a mirror above the sink'. Reverse all words of length '4' in the given sentence.


Output: a knis and a bathtub and shower htiw a mirror above the knis