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.

Sentence: 'a man plays a game with a wii controller'. Reverse all words of length '1' in the given sentence.
a man plays a game with a wii controller

Sentence: 'a large bird stands on the ledge of a window'. Reverse all words of length '3' in the given sentence.
a large bird stands on eht ledge of a window

Sentence: 'a blender sits on a table in a dark room'. Reverse all words of length '1' in the given sentence.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a blender sits on a table in a dark room

