There were $$18$$ children in a queue.  Counting from front to back, Vanessa was the $${{10}^{\text{th}}}$$ in the queue.  Andrea was the $${{12}^{\text{th}}}$$ counting from the end of the queue.  How many children were between Vanessa and Andrea? 
Overseas Competition->Knowledge Point->Word Problem Modules->Problems Involving Queuing->Finding the Positional Relationship between Two Characters without Overlapping