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 woman stepping out of a double decker bus'. Reverse all words of length '8' in the given sentence.
a woman gnippets out of a double decker bus

Sentence: 'the bicyclists race toward an old brick church'. Reverse all words of length '2' in the given sentence.
the bicyclists race toward na old brick church

Sentence: 'a purple teddy bear poses with an open book'. Reverse all words of length '1' in the given sentence.

a purple teddy bear poses with an open book