import java.util.*;
public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    }
} Main public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    } main {
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc String b = ""; b "" String data[] = a.split(""); data a.split("") a.split a "" for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            } int i = 0; int i = 0; i 0 data.length > i data.length data data.length i i++ i++ i {
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            } {
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            } if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              } i == 3 i 3 {
                data[i] = "8";
                b=b+data[i];
                
              } data[i] = "8" data[i] data i "8" b=b+data[i] b b+data[i] b data[i] data i {
                b=b+data[i];
              } b=b+data[i] b b+data[i] b data[i] data i System.out.println(b) System.out.println System.out System System.out b String[] args args public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    }
} public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	String a = sc.next();
        String b = "";
        String data[] = a.split("");
        	for(int i = 0;data.length > i;i++){
              if(i == 3){
                data[i] = "8";
                b=b+data[i];
                
              }else{
                b=b+data[i];
              }
            }
        System.out.println(b);
    }
}
