#include <iostream>
#include <iomanip>
#include <vector>
using namespace std;
int main(void) {
	int y, m, d;
	char tmp;
	cin >> y >> tmp >> m >> tmp >> d;
	vector<int> month = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
	if ((y % 4 == 0) ^ (y % 100 == 0) ^ (y % 400 == 0))
		month[2] = 29;

	d += 2;
	if (d > month[m]) {
		d = d % month[m];
		++m;
	}
	if (m > 12) {
		m = 1;
		++y;
	}
	cout << y << '/';
	cout << setfill('0') << right << setw(2) << m << '/';
	cout << setw(2) << d << endl;
	return 0;
}