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: 'wooden train passing through a forested hilly area'. Reverse all words of length '1' in the given sentence.
wooden train passing through a forested hilly area

Sentence: 'an image of a group of people sitting in the snow'. Reverse all words of length '6' in the given sentence.
an image of a group of elpoep sitting in the snow

Sentence: 'a football game on a grassy playing field'. Reverse all words of length '2' in the given sentence.

a football game no a grassy playing field