import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	}

} Main public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	} main {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	} Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) String S = stdIn.next(); S stdIn.next() stdIn.next stdIn char[] s = new char[S.length()]; s new char[S.length()] S.length() S.length S for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		} int i = 0; int i = 0; i 0 i < S.length() i S.length() S.length S i++ i++ i {
			s[i] = S.charAt(i);
		} {
			s[i] = S.charAt(i);
		} s[i] = S.charAt(i) s[i] s i S.charAt(i) S.charAt S i s[3] = '8' s[3] s 3 '8' System.out.println(s) System.out.println System.out System System.out s String[] args args public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	}

} public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	}

} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char[] s = new char[S.length()];
		for(int i = 0; i < S.length(); i++) {
			s[i] = S.charAt(i);
		}
		s[3] = '8';
		System.out.println(s);

	}

}