Count valid words on registration plates with Elixir

Elixir and :observer.start(), since app completion, look like this: Elixir application process tree Vehicle registration plates of Serbia, since 2011, look like this: src: Wikipedia Simple principle of 2 predefined letters (representing larger cities), 3 to 4 numbers and 2 random letters, e.g: BO 1234 OB It’s easy to guess where to go from here [...]