import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    }
} Main public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    } main {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    } Scanner s = new Scanner(System.in); s new Scanner(System.in) String str = s.next(); str s.next() s.next s StringBuilder sb = new StringBuilder(); sb new StringBuilder() sb.append(str).setCharAt(3, '8') sb.append(str).setCharAt sb.append(str) sb.append sb str 3 '8' System.out.println(sb) System.out.println System.out System System.out sb String[] args args public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    }
} public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner s = new Scanner(System.in);
        String str = s.next();
        StringBuilder sb = new StringBuilder();
        sb.append(str).setCharAt(3, '8');
        System.out.println(sb);
    }
}
