public static void Main()
{
var phoneBook = new Phonebook <string, string>();
string input;
while ((input = Console.ReadLine()) != "search")
{
var tokens = input.Split('-');
var name = tokens[0];
var phoneNumber = tokens[1];
phoneBook.Add(name, phoneNumber);
}
while ((input = Console.ReadLine()) != "end")
{
Console.WriteLine(phoneBook.Contains(input)
? $"{input} -> {phoneBook[input]}"
: $"Contact {input} does not exist.");
}
}
