using System;

public class Program

{

    public static void Main()

    {

        var usTest = "12062345266";

        var usTest2 = "2062345266";

        var usTest3 = "+12062345266";

        var caTest = "4035550311";

        var ukTest = "08081707788";

        var bcnTest = "+34 946 54 25 72";

        TestNumber(usTest);

        TestNumber(usTest2);

        TestNumber(usTest3);

        TestNumber(caTest);

        TestNumber(ukTest);

        TestNumber(bcnTest);

    }

    public static void TestNumber(string number)

    {

        var util = libphonenumber.PhoneNumberUtil.Instance;

        var check = util.Parse(number, "US");

        if (check.IsValidNumberForRegion("US"))

        {

            Console.WriteLine("US");

        }

        else if (check.IsValidNumberForRegion("CA"))

        {

            Console.WriteLine("CA");

        }

        else

        {

            Console.WriteLine("INTERNATIONAL");

        }           

    }

}