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: 'two people are holding rackets upright on a tennis court'. Reverse all words of length '7' in the given sentence.
two people are gnidloh stekcar thgirpu on a tennis court

Sentence: 'a couple walking in the rain using and umbrella'. Reverse all words of length '6' in the given sentence.
a elpuoc walking in the rain using and umbrella

Sentence: 'a man and woman sitting at a table together'. Reverse all words of length '7' in the given sentence.

a man and woman gnittis at a table together