public static void Main()
Console.WriteLine("Input your first name:");
string fname = Console.ReadLine();
string fthree = fname.Substring(0,3);
Console.WriteLine("Input your last name:");
string lname = Console.ReadLine();
string lthree = lname.Substring(L-3,3);
Console.WriteLine("Please input your gender:");
string gender = Console.ReadLine();
string fletter = gender.Substring(0,0);
Console.WriteLine("Please write your Year Group:");
string yr = Console.ReadLine();
Console.WriteLine(fthree + lthree + fletter + yr);