import java.util.Scanner;
public class Main{
  public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
    String date = sc.next();
    if(date.contains("2017") == true)
          System.out.println(date.replace("2017", "2018")); 
  }
}
/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