using System;
using System.Linq;

public class Pet
{
    public string Name { get; set; }
    public string Type { get; set; }
    public string Owner { get; set; }
}

public class Owner
{
    public string Name { get; set; }
    public string Country { get; set; }
}

public class Test
{
     public static void Main()
     {
	
	Pet[] pets =
            {
                new Pet() { Name = "Vasya", Type = "Cat", Owner = "John" },
                new Pet() { Name = "Borya", Type = "Dog", Owner = "Dean" },
                new Pet() { Name = "Kim", Type = "Hedgehog", Owner = "Mary" },
                new Pet() { Name = "Joka", Type = "Dog", Owner = "John" },
                new Pet() { Name = "Mursick", Type = "Cat", Owner = "Dean" },
                new Pet() { Name = "Mick", Type = "Cat", Owner = "Mary" },
                new Pet() { Name = "John", Type = "Hedgehog", Owner = "John" },
                new Pet() { Name = "Jynx", Type = "Dog", Owner = "Dean" }
            };
        
            Owner[] owners =
            {
                new Owner() { Name = "John", Country = "USA" },
                new Owner() { Name = "Mary", Country = "Switzerland" },
                new Owner() { Name = "Dean", Country = "Great Britain" }
            };

            var el = from o in owners
                join p in pets
                    on o.Name equals p.Owner
                group p by new {o.Country, p.Type}
                into grp select new { Country = grp.Key.Country, Type = grp.Key.Type, Count = grp.Count() };
 
            foreach(var e in el) {
	    Console.WriteLine(e.Country + "  "+ e.Type+"  "+e.Count);	
	}
      }
}