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 small elephant standing next to a forest full of trees'. Reverse all words of length '5' in the given sentence.

Ex Output:
a llams elephant standing next to a forest full of seert


Ex Input:
Sentence: 'the three trains are stopped on the railroad tracks'. Reverse all words of length '6' in the given sentence.

Ex Output:
the three sniart are stopped on the railroad skcart


Ex Input:
Sentence: 'some children are sitting around a table eating'. Reverse all words of length '3' in the given sentence.

Ex Output:

some children era sitting around a table eating