#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;


int main() {
	int i, j, k;   
	string s;
	int mo12[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 };


	cin >> s;
	
	string year = s.substr(0, 4);
	string mon = s.substr(5, 2);
	string day = s.substr(8, 2);

	int numy = stoi(year);
	int numm = stoi(mon);
	int numday = stoi(day);



	if (numy % 4 == 0) {
		if (numy % 100 == 0 && numy % 400 != 0) {
			goto label;
		}

		if (numm != 2) goto label;

		if (numday <= 27) {
			numday += 2;
		}
		else {
			int hami = abs(29 - (numday + 2));
			numm++;
			numday = hami;
		}

	}
	else {
	label:

		if (numday <= 26) {
			numday += 2;
		}
		else {
			if (mo12[numm - 1] < numday + 2) {
				int hami = abs(mo12[numm - 1] - (numday + 2));
				numm++;
				//numy++;
				if (numm > 12) {
					numm = 1;
					numy++;
				}
				numday = hami;
			}
			else {
				numday += 2;
			}
		}
	}

	cout << numy << "/" << setfill('0') << setw(2) << numm << "/" << setfill('0') << setw(2) << numday << endl;



	

	getchar();
	getchar();
	return 0;
}