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 very large truck with people in back on a city street'. Reverse all words of length '6' in the given sentence.

Ex Output:
a very large truck with elpoep in back on a city teerts


Ex Input:
Sentence: 'pictures a candle a single flower and a stuffed bear on a table'. Reverse all words of length '6' in the given sentence.

Ex Output:
pictures a eldnac a elgnis rewolf and a stuffed bear on a table


Ex Input:
Sentence: 'a village field and cows eating by a river'. Reverse all words of length '4' in the given sentence.

Ex Output:

a village field and swoc eating by a river