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: 'a woman holding an umbrella next to another person and a group of umbrellas and in front of a brick wall'. Reverse all words of length '5' in the given sentence.

a namow holding an umbrella next to another person and a puorg of umbrellas and in tnorf of a kcirb wall