import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    }
} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    } main {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) StringBuilder target = new StringBuilder(scanner.next()); target new StringBuilder(scanner.next()) target.setCharAt(3,'8') target.setCharAt target 3 '8' System.out.println(target) System.out.println System.out System System.out target String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder target = new StringBuilder(scanner.next());
        target.setCharAt(3,'8');

        System.out.println(target);
    }
}
