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 street performer copying a woman on her phone'. Reverse all words of length '7' in the given sentence.
a street performer gniypoc a woman on her phone

Sentence: 'a woman holding a stuffed bear dressed as santa'. Reverse all words of length '2' in the given sentence.
a woman holding a stuffed bear dressed sa santa

Sentence: 'a young man standing on a bed using a phone'. Reverse all words of length '2' in the given sentence.

a young man standing no a bed using a phone