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 young boy plays with a phone sitting on the ground'. Reverse all words of length '6' in the given sentence.

Ex Output:
a young boy plays with a phone sitting on the dnuorg


Ex Input:
Sentence: 'an elderly man in a jacket is walking outside of a window'. Reverse all words of length '3' in the given sentence.

Ex Output:
an elderly nam in a jacket is walking outside of a window


Ex Input:
Sentence: 'stop sign with a no stopping sign below posted during certain hours'. Reverse all words of length '5' in the given sentence.

Ex Output:

stop sign with a no stopping sign woleb posted during certain sruoh