import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    }

    private Scanner scan = new Scanner(System.in);
    private StringBuilder str;

    public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    }

    public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    }

    private Scanner scan = new Scanner(System.in);
    private StringBuilder str;

    public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    }

    public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    }
} Main private Scanner scan = new Scanner(System.in); scan new Scanner(System.in) private StringBuilder str; str public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    } main {
	Main m = new Main();
	m.answer();
    } Main m = new Main(); m new Main() m.answer() m.answer m String[] args args public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    } Main {
	str = new StringBuilder(scan.next());

	scan.close();
    } str = new StringBuilder(scan.next()) str new StringBuilder(scan.next()) scan.close() scan.close scan public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    } answer {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    } str.setCharAt(3, '8') str.setCharAt str 3 '8' System.out.println(str.toString()) System.out.println System.out System System.out str.toString() str.toString str public class Main {

    public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    }

    private Scanner scan = new Scanner(System.in);
    private StringBuilder str;

    public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    }

    public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    }
} public class Main {

    public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    }

    private Scanner scan = new Scanner(System.in);
    private StringBuilder str;

    public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    }

    public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
	Main m = new Main();
	m.answer();
    }

    private Scanner scan = new Scanner(System.in);
    private StringBuilder str;

    public Main() {
	str = new StringBuilder(scan.next());

	scan.close();
    }

    public final void answer() {
	str.setCharAt(3, '8');
	System.out.println(str.toString());
    }
}
