public static void Main()
Console.WriteLine("Daniel Mosqueda Alfaro 1-E");
Console.WriteLine(test("C Sharp"));
Console.WriteLine(test("JS"));
Console.WriteLine(test("a"));
public static string test(string str)
return str.Length < 2 ? str : str.Substring(0, 2) + str.Substring(0, 2) + str.Substring(0, 2) + str.Substring(0, 2);