Python Basics
https://docs.python.org/2/library/string.html https://www.geeksforgeeks.org/python-using-2d-arrays-lists-the-right-way/ https://link.springer.com/chapter/10.1007/978-3-319-08783-2_46 https://www.geeksforgeeks.org/floor-ceil-function-python/ https://www.codesdope.com/python-readreadread/ https://en.wikibooks.org/wiki/Python_Programming/Operators