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

const long long INF = 1LL << 60;
#define MOD 1000000007;

typedef long long ll;

#define writeln(n) cout<<n<<endl;

typedef pair<float, float> P;

typedef pair<string, int> Psi;

int days[13] ={0,31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int main() {

	string s;
	cin>>s;

	int y ,m,d;

	sscanf(s.c_str(),"%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("%04d/%02d/%02d\n", y, m, d);

}