#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
using namespace std;

//#include<bits/stdc++.h>

int main() {
	
	string p;
	cin >> p;
	int y = 0, m = 0, d = 0;
	for (int i = 0; i < 4; i++) {y *= 10;
		y += (p[i] - '0') ;
		
		
	}
	
	m += (p[5] - '0') * 10 + p[6] - '0';
	d += (p[8] - '0') * 10 + p[9] - '0';
	
	int x[15] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
	if (y % 4 == 0 && y % 100==0&&y%400==0)x[2] = 29;

	d += 2;
	if (d > x[m]) {
		d -= x[m]; m++;
		if (m > 12) {
			y++; m = 1;
		}
	}
	cout << y << "/"  ;
	if (m < 10)cout << "0";
	cout << m << "/";
	if (d < 10)cout << "0";
	cout<< d << endl;



	return 0;
}