using System;

public class Program {

    public static void Main()

    {

        string[] animals = new string[] { "Urban", "Rural", "Wild", "Wild Birds", "Zoo" };

        int[] table = new int[] { 35, 50, 75, 85 };

        for (int catNum = 10; catNum <= 100; catNum += 10)

        {

            int index = Array.BinarySearch(table, catNum);

            if (index < 0) index = ~index;

            Console.WriteLine(catNum + ": " + animals[index]);

        }

    }

}