import java.util.*;

public class Main {
	public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String a = sc.next();
		String b = a.substring(0, 3) + "8" + a.substring(4);
		System.out.println(b);
  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz