import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  }
} import java.util.*; util.* java public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc String ans = ""; ans "" for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    } {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    } if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      } i == 3 i 3 {
        ans += "8";
      } ans += "8" ans "8" {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      } String str = String.valueOf(s.charAt(i)); str String.valueOf(s.charAt(i)) String.valueOf String s.charAt(i) s.charAt s i ans += str ans str System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String ans = "";
    for(int i = 0; i < s.length(); i++) {
      if(i == 3) {
        ans += "8";
      } else {
        String str = String.valueOf(s.charAt(i));
        ans += str;
      }
    }
    System.out.println(ans);
  }
}
