import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
Scanner scan=new Scanner(System.in);
String a=scan.next();
char b[]=new char[a.length()];
for(int i=0;i!=a.length();i++) {
	char c=a.charAt(i);
	if(i==3) {
		c='8';
	}
	b[i]=c;
}
for(int i=0;i!=a.length();i++) {
	System.out.print(b[i]);
}
System.out.println();
	}
}

/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