import java.util.*;
import static java.lang.Integer.*;
//import static java.lang.Long.*;
//import static java.lang.Math.*;
import static java.lang.System.*;
import static java.lang.Math.*;

public class Main {
	public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	}
} import java.util.*; util.* java import static java.lang.Integer.*; import static java.lang.Integer.*; import static java.lang.Integer.*; import static java.lang.System.*; import static java.lang.System.*; import static java.lang.System.*; import static java.lang.Math.*; import static java.lang.Math.*; import static java.lang.Math.*; public class Main {
	public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	}
} Main public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	} main {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	} int i i j; j Scanner sc = new Scanner(in); sc new Scanner(in) char[] s = sc.next().toCharArray(); s sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc sc.close() sc.close sc s[3] = '8' s[3] s 3 '8' out.println(new String(s)) out.println out new String(s) String[] args args public class Main {
	public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	}
} public class Main {
	public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	}
} Main
import java.util.*;
import static java.lang.Integer.*;
//import static java.lang.Long.*;
//import static java.lang.Math.*;
import static java.lang.System.*;
import static java.lang.Math.*;

public class Main {
	public static void main(String[] args) {
		int i,j;
		Scanner sc = new Scanner(in);
		char[] s = sc.next().toCharArray();
		sc.close();
		s[3] = '8';
		out.println(new String(s));
	}
}
