TASK 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.
PROBLEM: Sentence: 'a bathroom with just a toilet and toilet paper'. Reverse all words of length '1' in the given sentence.

SOLUTION: a bathroom with just a toilet and toilet paper

PROBLEM: Sentence: 'a train billowing smoke as it crosses a river by bridge'. Reverse all words of length '1' in the given sentence.

SOLUTION: a train billowing smoke as it crosses a river by bridge

PROBLEM: Sentence: 'a train sitting next to a loading platform'. Reverse all words of length '4' in the given sentence.

SOLUTION:
a train sitting txen to a loading platform