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There are only 21 ways to place regular polygons in gapless tilings. The point where the polygons meet is called a vertex. Vertices are named by the polygons meeting there. For instance, the vertex where four squares meet is 4.4.4.4. In this post, I will make code to find and draw all possible vertices.

I had to write a python script that transforms incoming date organised into a folder structure. For this, I needed both a simple python representation and an easy way to print the data.

The freaction of a repdigit and the sum of its digits ... it is sometimes an integer.