#include <bits/stdc++.h>
using namespace std;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);  
	int days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int y, m, d;
	scanf("%d/%d/%d", &y, &m, &d);
	if(y % 4 == 0 && !(y % 100 == 0 && y % 400 != 0)) days[2] = 29;
	d += 2;
	if(days[m] < d) {
		d -= days[m];
		m++;
		if(12 < m) {
			y++;
			m = 1;
		}
	}
	printf("%d/%02d/%02d", y , m, d);
	return 0;	
}