import java.util.*;

public class Main{

     public static void main(String []args){
        String S , A;
        Scanner sc = new Scanner(System.in);
        S = sc.nextLine();
        A = S.substring(0,4);
        if(A.equals("2018") == false){
           S = S.replace(A, "2018");
        } 
        System.out.println(S);
     }
}
/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