/*
Given a String variable s, 
write a code segment that 
outputs each letter in the string twice. 
For example, if s = "Hello", the code should output "HHeelllloo".
 */
import java.util.Scanner;
public class HW4q2d {
	public static void main(String[] args)
	{
		Scanner kb=new Scanner(System.in);
		
		String userStr=kb.nextLine();
		int length=userStr.length();
		int pos=0;
		while (length>pos)
		{
			System.out.print(userStr.charAt(pos));
			System.out.print(userStr.charAt(pos));
			pos++;
		}
		System.out.println();
	}
}