Source google image: https://www.gotthegift.co.uk/images/uploads/puzzles/professor%20puzzle/Kids%20Set%20-%20Bamboo%20Set%20of%205-%20Products.jpg
Professor puzzle solution
Source google image: https://www.gotthegift.co.uk/images/uploads/puzzles/professor%20puzzle/Kids%20Set%20-%20Bamboo%20Set%20of%205-%20Products.jpg