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 group of people sitting on a wooden bench'. Reverse all words of length '1' in the given sentence.
a group of people sitting on a wooden bench

Sentence: 'two motorcycles sidebyside parked in a grassy area'. Reverse all words of length '3' in the given sentence.
owt motorcycles sidebyside parked in a grassy area

Sentence: 'a coffee cup filled with a pair of scissors and other office items'. Reverse all words of length '6' in the given sentence.

a eeffoc cup dellif with a pair of scissors and other eciffo items