import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    }
} Main public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    } main {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    } final Scanner sc = new Scanner(System.in); sc new Scanner(System.in) StringBuilder sb = new StringBuilder(sc.next()); sb new StringBuilder(sc.next()) sb.setCharAt(3, '8') sb.setCharAt sb 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) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    }
} public class Main {
    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        StringBuilder sb = new StringBuilder(sc.next());
        sb.setCharAt(3, '8');

        System.out.println(sb);
    }
}