import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	}
} Main public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	} main {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) String s = in.nextLine(); s in.nextLine() in.nextLine in String sub1 = s.substring(0, 3); sub1 s.substring(0, 3) s.substring s 0 3 String sub2 = s.substring(4, s.length()); sub2 s.substring(4, s.length()) s.substring s 4 s.length() s.length s System.out.println(sub1+"8"+sub2) System.out.println System.out System System.out sub1+"8"+sub2 sub1+"8"+sub2 sub1 "8" sub2 String[] args args public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String s = in.nextLine();
		String sub1 = s.substring(0, 3);
		String sub2 = s.substring(4, s.length());
		
		System.out.println(sub1+"8"+sub2);
	}
}