using System;

public class Program

{

    public static void Main()

    {

        string s,s1,s2;

        s=Console.ReadLine();

        s="Diana";

        s1=Console.ReadLine();

        s1="..............";

        s2=Console.ReadLine();

        s2=".................";

        Console.WriteLine(s[0]+s1[0]+s2[0]);

    }

}