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: 'teenagers riding skateboards in a concrete skate park'. Reverse all words of length '1' in the given sentence.
teenagers riding skateboards in a concrete skate park

Sentence: 'a couple of trains are sitting on some tracks'. Reverse all words of length '2' in the given sentence.
a couple fo trains are sitting no some tracks

Sentence: 'a metal pan filled with lots of veggies in broth'. Reverse all words of length '3' in the given sentence.

a metal nap filled with lots of veggies in broth