import java.util.Scanner;
 public class Test1009{
   public static void main (String[] args) {
        Scanner in=new Scanner(System.in);
        int number,digit1,digit2,digit3,digit4,newnum;
        number=in.nextInt();
        digit1=number/1000;
        digit2=(number%1000)/100;
        digit3=((number%1000)%100)/10;
        digit4=number%10;
       /*
        * System.out.println("digit1="+digit1+" digit2="+digit2+" digit3="+digit3+" digit4="+digit4);
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