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

Answer: the three sniart are stopped on the railroad skcart


Question: Sentence: 'there is a large black bear that is siting on a rock'. Reverse all words of length '5' in the given sentence.

Answer: ereht is a egral kcalb bear that is siting on a rock


Question: Sentence: 'the young girl is in the grassy field playing frisbee'. Reverse all words of length '2' in the given sentence.

Answer:
the young girl si ni the grassy field playing frisbee