import java.util.*;

public class Main {
	public static void main(String[] args) {

		String s = "2017/01/";
		Scanner scanner = new Scanner(System.in);
		s= scanner.next();
		String st = "2018/01/";
		System.out.println(st+s.substring(8));
		scanner.close();
	}

}

/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