import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		a[3]='8';
		System.out.print(a);
		
    }
} import java.util.*; util.* java class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		a[3]='8';
		System.out.print(a);
		
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		a[3]='8';
		System.out.print(a);
		
    } main {
        Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		a[3]='8';
		System.out.print(a);
		
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char[] a = sc.next().toCharArray(); a sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc a[3]='8' a[3] a 3 '8' System.out.print(a) System.out.print System.out System System.out a String[] args args
import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
		char[] a = sc.next().toCharArray();
		a[3]='8';
		System.out.print(a);
		
    }
}