Definition: 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.
Input: Sentence: 'people wait for their baggage at an airport baggage claim area'. Reverse all words of length '7' in the given sentence.

people wait for their egaggab at an tropria egaggab claim area