import java.util.*;

class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {

		Calendar cl = Calendar.getInstance();
		String s = sc.next();
		int y = Integer.parseInt(s.substring(0,4));
		int m = Integer.parseInt(s.substring(5,7));
		int d = Integer.parseInt(s.substring(8,10));
		
		
		cl.set(y, m-1, d);
		cl.add(Calendar.DATE, 2);
		
		
		System.out.println(cl.get(Calendar.YEAR)+"/"+String.format("%02d", cl.get(Calendar.MONTH)+1)+"/"+String.format("%02d", cl.get(Calendar.DATE)));

	}
}