A student wants to download past examinations in all the subjects given in the subjects list of the template code. To that end, the student needs links in the following format:
http://imaginary-site.com/download/{subject}-{year}
For instance, the past paper in math from 2015 would be:
http://imaginary-site.com/download/math-2015
Create a file named urls.txt that will have all necessary links separated with newlines. You need to include links for all subjects and all years from 2010 to 2018 (inclusive). Start with the first subject, and generate its links for all years. Then, move on to the next subject, and so on.