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 hand reaching out towards a standing giraffe'. Reverse all words of length '7' in the given sentence.
a hand reaching out sdrawot a standing effarig

Sentence: 'the dog looks up at the cat sitting on a stone'. Reverse all words of length '1' in the given sentence.
the dog looks up at the cat sitting on a stone

Sentence: 'some people standing and holding onto wine glasses'. Reverse all words of length '7' in the given sentence.

some people standing and gnidloh onto wine sessalg