import java.util.*;

class Main {
   public static void main(String[] args)
   {
      Scanner       scan = new Scanner(System.in);
      String        st   = scan.next();
      StringBuilder str  = new StringBuilder(st);

      str.setCharAt(3, '8');

      System.out.println(str);
   }
} import java.util.*; util.* java class Main {
   public static void main(String[] args)
   {
      Scanner       scan = new Scanner(System.in);
      String        st   = scan.next();
      StringBuilder str  = new StringBuilder(st);

      str.setCharAt(3, '8');

      System.out.println(str);
   }
} Main public static void main(String[] args)
   {
      Scanner       scan = new Scanner(System.in);
      String        st   = scan.next();
      StringBuilder str  = new StringBuilder(st);

      str.setCharAt(3, '8');

      System.out.println(str);
   } main {
      Scanner       scan = new Scanner(System.in);
      String        st   = scan.next();
      StringBuilder str  = new StringBuilder(st);

      str.setCharAt(3, '8');

      System.out.println(str);
   } Scanner       scan = new Scanner(System.in); scan new Scanner(System.in) String        st   = scan.next(); st scan.next() scan.next scan StringBuilder str  = new StringBuilder(st); str new StringBuilder(st) str.setCharAt(3, '8') str.setCharAt str 3 '8' System.out.println(str) System.out.println System.out System System.out str String[] args args
import java.util.*;

class Main {
   public static void main(String[] args)
   {
      Scanner       scan = new Scanner(System.in);
      String        st   = scan.next();
      StringBuilder str  = new StringBuilder(st);

      str.setCharAt(3, '8');

      System.out.println(str);
   }
}
