import java.util.* ;
class Main {
  public static void main(String[] args) {
    
    Scanner scan = new Scanner(System.in);
	String s = scan.nextLine();
    char[] ch = s.toCharArray();
    ch[3] = '8';
    s= String.valueOf(ch);
    System.out.println(s);
  }
} import java.util.* ; util.* java class Main {
  public static void main(String[] args) {
    
    Scanner scan = new Scanner(System.in);
	String s = scan.nextLine();
    char[] ch = s.toCharArray();
    ch[3] = '8';
    s= String.valueOf(ch);
    System.out.println(s);
  }
} Main public static void main(String[] args) {
    
    Scanner scan = new Scanner(System.in);
	String s = scan.nextLine();
    char[] ch = s.toCharArray();
    ch[3] = '8';
    s= String.valueOf(ch);
    System.out.println(s);
  } main {
    
    Scanner scan = new Scanner(System.in);
	String s = scan.nextLine();
    char[] ch = s.toCharArray();
    ch[3] = '8';
    s= String.valueOf(ch);
    System.out.println(s);
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String s = scan.nextLine(); s scan.nextLine() scan.nextLine scan char[] ch = s.toCharArray(); ch s.toCharArray() s.toCharArray s ch[3] = '8' ch[3] ch 3 '8' s= String.valueOf(ch) s String.valueOf(ch) String.valueOf String ch System.out.println(s) System.out.println System.out System System.out s String[] args args
import java.util.* ;
class Main {
  public static void main(String[] args) {
    
    Scanner scan = new Scanner(System.in);
	String s = scan.nextLine();
    char[] ch = s.toCharArray();
    ch[3] = '8';
    s= String.valueOf(ch);
    System.out.println(s);
  }
}
