import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		}
	} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		}
	} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		} main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc String[] sl = s.split(""); sl s.split("") s.split s "" sl[3] = "8" sl[3] sl 3 "8" System.out.println(String.join("", sl)) System.out.println System.out System System.out String.join("", sl) String.join String "" sl String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		}
	} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		}
	} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String[] sl = s.split("");
		sl[3] = "8";
		System.out.println(String.join("", sl));
		}
	}