/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner in = new Scanner(System.in);
        int[] nums = new int[5];
        for(int i=0;i < nums.length; i++){
            nums[i]=in.nextInt();
        }
 
        for(int i=0;i < nums.length; i++){
            System.out.print(nums[i]);
        }
        System.out.println();
	}
}

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