age cathegories
Junior age category: younger than 10 years inclusive
Middle age category: 11 to 16 years inclusive
Student age category: 17 to 26 years inclusive
Senior age category (adults): from 27 years inclusive
Middle age category: 11 to 16 years inclusive
Student age category: 17 to 26 years inclusive
Senior age category (adults): from 27 years inclusive
