#define _USE_MATH_DEFINES

#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max,count
#include <string>	//string,getline, to_string
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap, pair
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt,ceil,M_PI, pow, sin
#include <sstream>	//stringstream,getline
#include <numeric>	//gcd, accumlate
#include <deque>	//deque
#include <random>	//randam_device
#include <limits>	//numeric_limits

using namespace std;
constexpr long long int D_MOD = 1000000007;

inline bool Judge_LeapYear(int year) {

	bool flg = false;
	if (year % 4 == 0) {
		flg = true;
		if (year % 100 == 0) {
			flg = false;
			if (year % 400 == 0) {
				flg = true;
			}
		}
	}
	return(flg);
}

inline int Days_Count(int year, int month) {

	int day = 0;
	if (month == 2) {
		if (Judge_LeapYear(year)) {
			day = 29;
		}
		else {
			day = 28;
		}
	}
	else {
		switch (month) {
		case 4: //day = 30; break;
		case 6: //day = 30; break;
		case 9: //day = 30; break;
		case 11: day = 30; break;
		default: day = 31; break;
		}
	}

	return day;
}

int main() {

	int y, m, d;
	scanf("%d/%d/%d", &y, &m, &d);

	if (d <= 26) {
		d += 2;
	}
	else {
		d += 2;
		int end_day = Days_Count(y, m);
		if (d > end_day) {
			d = d - end_day;
			m++;
		}
	}
	if (m == 13) {
		m = 1;
		y++;
	}

	cout << y << "/";
	cout << setfill('0') << right << setw(2) << m;
	cout << "/";
	cout << setfill('0') << right << setw(2) << d << endl;

	return 0;

}