import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String[] sp = s.split("/", 0);
    int[] days = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int y = Integer.parseInt(sp[0]);
    int m = Integer.parseInt(sp[1]);
    int d = Integer.parseInt(sp[2]);
    if((y % 4 == 0) && !((y % 100 == 0) && (y % 400 != 0))) days[2] = 29;
    String ans = "";
    if((d + 2) <= days[m]) {
      String sm = String.valueOf(m);
      String sd = String.valueOf(d + 2);
      if(m < 10) sm = "0" + sm;
      if(d < 8) sd = "0" + sd;
      ans = y + "/" + sm + "/" + sd;
    } else {
      int rd = d + 2 - days[m];
      if(m < 12) {
        String sm = String.valueOf(m + 1);
        if(m < 9) sm = "0" + sm;
        ans = y + "/" + sm + "/" + "0" + rd;
      } else {
        ans = (y + 1) + "/01/" + "0" + rd;  
      }
    }
    System.out.println(ans);
  }
}