using System;

public class Abbreviation

{

    string str;

    public string GetUserInput(){

    Console.WriteLine("Please Enter the Text");

    str=Console.ReadLine(); 

    return str;

    }

    public void GetAbbriviation(){

    char [] input,result=null;

    input=new char[str.Length];

    result=new char[str.Length];

    int counter=0; 

    input=str.ToCharArray();

    //Console.WriteLine(input);

    for(int i=0;i<str.Length;i++){  

        if(i==0){

            result[counter++]=Convert.ToChar(Convert.ToByte(input[i])-32);  

        }       

        if(Convert.ToByte(input[i])==32){

        result[counter++]='.';

        result[counter++]= Convert.ToChar(Convert.ToByte(input[i+1])-32);   

        }       

    }

    Console.WriteLine(result);  

    }

    public static void Main()

    {

        Console.WriteLine("Abbreviation Praogram");

        Abbreviation abbr=new Abbreviation();

        abbr.str=abbr.GetUserInput();

        abbr.GetAbbriviation();

    }

}