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